Play Big Bang Theory Who Did It To Earn The Title Of Biggest Fan

Everyone knows that fourteen million years ago the whole universe was in a hot, dense state, but not everyone knows The Big Bang Theory well enough to pass this quiz. That title is reserved for only the biggest fans of the long-running sitcom. Casual viewers might find some of these questions as difficult to answer as Howard's relationship with his loud and codependent mother, may she rest in peace.

It doesn't take an advanced degree in experimental physics to win this game of Big Bang Theory "Who Did It?" But it might help.

(We're kidding, of course. A lowly Masters in Engineering will do. Maybe.)

(Sorry not sorry, Howard.)

Anyone who considers themselves to be a Big Bang Theory buff needs to step up to the hotplate and take this quiz. Spanning ten seasons of the fan favorite TV show, this quiz will likely stump all but the most dedicated of viewers.

Breakups and scientific breakthroughs, career changes and cosplays - this quiz covers it all. Pass this Big Bang Theory "Who Did It?" quiz and earn a PhD in The Big Bang Theory, eternal bragging rights, and a permanent seat at Sheldon's favorite spot on the couch in apartment 4A.

Question 1

Who got fired for insulting the new head of the Physics Department?

Leonard, Sheldon, Raj and Howard are all working scientists at CalTech, but when Dr. Eric Gablehauser is appointed to head of the Physics Department, not all of the guys get along with their new boss. One guy, in particular, butts heads with Dr. Gablehauser from the start because he feels that his new boss is not at all qualified for the position. Eventually, he apologizes to the boss and gets his job back. Who got fired for insulting the new head of the Physics Department?

Question 2

Who ended up taking care of Sheldon when he caught a cold?

Sheldon Cooper certainly is a force to be reckoned with, except when his immune system goes totally rogue and turns on him. When he finds himself with a cold, none of his friends really want to take care of the finicky man-child, but one good friend gets roped into being his caretaker. From rubbing Vicks vaporub on his chest to singing his favorite feel-good lullaby, Soft Kitty, this pal cements their friendship with some old fashioned TLC. Who was it?

Question 3

Who decides to get rid of all his collectibles after Penny mocks his time machine?

Hey, $800 for a time machine is practically a steal, especially when its a life-size prop from the actual movie. When the guys go in on a time machine, they have a little bit of difficulty getting it up the stairs, Penny gets stuck between a time machine and a hard place. She ends up missing her shift at the Cheesecake Factory and scolds the gang for having such childish hobbies. One of the guys takes Penny's scolding to heart and decides to get rid of his collectibles.

Question 4

Who does Sheldon get to help him clean Penny's apartment in the middle of the night?

When Penny asks Leonard and Sheldon to accept a package for her while she's at work, the last thing she expects is for Sheldon to become obsessed with the level of untidiness in her apartment. He becomes so obsessed, in fact, that he breaks into her apartment in the middle of the night to clean and organize it unbeknownst to Penny. It's more than a one-man job, though. Who does he rope into helping him cleaning Penny's super messy apartment?

Question 5

With whom does Raj's blind date end up leaving after he behaves badly?

When Raj's parents set him up on a blind date with a woman named Lalita, he scrambles to get over his selective mutism so he can actually talk to her. Fortunately for him, Penny starts practicing her bartending skills and Raj discovers that he can talk to women with the help of a little liquid courage. Unfortunately for him (and Lalita), he goes overboard with the grasshopper cocktails on their date and Lalita ends up leaving with a very unlikely suspect.

Question 6

Who gets chosen as one of People Magazine's "30 Visionaries Under 30?"

When one of the guys makes an important scientific discovery in his field, he skyrockets to superstardom on People Magazine's list of "30 Visionaries under 30." The accomplishment goes straight to his head and the rest of the gang finds his newfound fame to be a disruptive influence on their group dynamic. He finally gets a dose of reality when his date to the magazine's big reception (a supportive Penny) ends in disaster. Who was selected as People Magazine's young visionary?

Question 7

Who does Sheldon ban from the apartment?

Sheldon finds himself in an all out war when a series of perceived slights escalates to the point of no return. First, this person commandeers the television when the guys are supposed to be playing Klingon Boggle - strike one. Strike two occurs when this person tries to steal one of his onion rings. Strike three happens when this brave individual takes a stand, metaphorically, by sitting in his beloved spot on the couch, resulting in a banning from apartment 4A.

Question 8

Who lends Penny money when she is short on rent?

Penny isn't exactly known for being the most financially responsible member of the gang. She forces the guys to watch America's Top Model after her cable gets shut off due to non-payment. She almost never kicks in for takeout at dinner. And she is constantly stealing Leonard and Sheldon's WiFi. So, it was no surprise when she ended up short on her rent. What was surprising, however, was how willing a certain someone was to lend her the cash she needed.

Question 9

Who shoots Sheldon's beloved sofa cushion with a paintball gun?

It really is the perfect spot. During the winter months, it's close enough to the radiator to stay warm, but not so close as to cause perspiration. In the summer, it's perfectly situated to catch a cross breeze from the windows. It lives in a state of eternal dibs - it's Sheldon's spot on the couch. He's admitted to loving it more than his mother, so he was rightfully upset when someone accidentally shoots it with a paintball gun, leaving a big green stain.

Question 10

Who designed a special toilet for the International Space Station?

Sheldon, Leonard, Howard and Raj are all accomplished scientists, but only one of the guys had the fortune of designing a special toilet for the International Space Station. But when it malfunctions, he must enlist the help of his friends to find a fix for the classified project. Armed with a replica of the space toilet and a hefty portion of Howard's mom's meatloaf, the guys go to work on coming up with a solution. It took the entire gang to fix it, but who designed the space toilet?

Question 11

Who teaches Leonard about football so he can fit in at a game day party?

When Leonard finds out that Penny threw a football watching party without inviting him, he naturally assumes that it's because she is embarrassed to have him meet her friends. So, he resolves to learn all about the game so he can blend in at the next big game party. Leonard finds help in an unexpected source, and while he does learn all of the rules of the game, he still doesn't quite blend in. Who teaches Leonard all about football?

Question 12

Who misses the chance to meet Stan Lee at the comic book store?

Nobody idolizes Stan Lee quite like Sheldon, Leonard, Raj and Howard. It was too bad that a scheduled traffic court appearance prevented one of the guys from meeting the legend during a meet and greet at Stuart's comic book store. Thankfully, Penny saves the day when she scores Stan Lee's address from Stuart in exchange for a wedding date. And even though his impromptu visit to Stan Lee's home results in a restraining order, this Big Bang character is thoroughly pleased with the experience.

Question 13

Who dates Raj's sister, Priya?

When Raj's accomplished sister, Priya, arrives to California for a visit, the other guys in the gang agree not to hit on her. This agreement, of course, is short-lived as one of his friends ends up having a secret relationship with her. Eventually, the truth does come out much to Raj (and Penny's) chagrin. The pair may not have had a lasting relationship, but she does manage to help him improve his style with a wardrobe makeover. Who dates Raj's sister?

Question 14

Who serenades the girl he is dating at The Cheesecake Factory?

Even though love never came easy for the guys of the Big Bang Theory, they all end up paired off and married, for the most part. (Except Raj. Tough luck, buddy.) One of the show's popular couples got off to a rocky start when the guy wasn't sure his future wife would measure up to his famous crushes. Eventually he realized his lapse in judgement and tries to win her back with a song and dance number at The Cheesecake Factory.

Question 15

Who drives Penny to the hospital when she dislocates her shoulder?

Penny may have been the most reluctant member of the Big Bang gang, but she could always count on the guys when she needed them the most. Whether it was something as simple as accepting a package or covering her share of that night's takeout dinner, or something more involved, like helping her get her Penny Blossom business of the ground, she could always rely on the guys. When she falls in the shower and dislocates her shoulder, she gets help from an unexpected source.

Question 16

Who dated a spy from North Korea?

The guys of The Big Bang Theory never had it easy when it came to dating. In fact, one guy came very close to revealing classified secrets about a rocket fuel project he was working on for the government to a North Korea spy named Joyce Kim. And while it may have really bugged him at the time that one of the other guys awkwardly interrupted his date with Joyce Kim, in hindsight he knows it was definitely for the best.

Question 17

Who gets acting lessons from Penny to improve his teaching technique?

The guys of The Big Bang Theory may all be very accomplished scientists and researchers, but that doesn't necessarily make them good teachers. When one of the guys struggles to maintain the respect of his students who roast him mercilessly on social media, he gets an outside of the box suggestion: why not turn to Penny for acting lessons? It is, after all, the teacher's duty to engage and entertain the students. We never find out if the lessons did the trick or not, but hey, it was worth a shot.

Question 18

Who pretends to date Leonard to impress her dad?

Leonard Hofstadter is definitely a nice guy with a lot of great qualities. He is an accomplished experimental physicist. He is the leader of his gang of affable geeks. And even though he may not be the most manly of specimens, he is not afraid to stand up to a bigger, tougher guy when necessary. He is quite the catch, so it's no wonder someone pretends to date him in order to impress her finicky dad, who never really approved of her dating choices.

Question 19

Who cheats on his girlfriend with an artist he meets at the comic book store?

Relationships can be complicated and nobody knows that better than the guys of The Big Bang Theory. One guy, in particular, finds himself navigating a very complicated situation when he experiences an instant attraction to an artist he meets at Stuart's comic book shop. The only problem? He has a long-distance girlfriend. Things get even more complicated when he confesses the whole thing to her. She forgives him instantly, but also reveals that she had a similar experience with an ex-boyfriend.

Question 20

Who messes up Howard's chances at scoring top secret government clearance?

Howard might not have a doctorate like the rest of the guys in the group, but he is still an accomplished scientist and engineer. When a very intimidating F.B.I. agent interviews all of the guys in his social circle, one of them messes up his chances by revealing the time that Howard crashed the Mars rover trying to impress a woman. It would take more than just an apology to win back Howard's friendship, but eventually they pair resolve their conflict.

Question 21

Who plays translator when Raj dates a woman who is hard of hearing?

Dating never came easy to Raj. For one, it was pretty hard to get to know someone when his selective mutism made it impossible to even speak to women. (That is, unless he had the liquid courage that comes with a couple cocktails.) So when he gets set up with a woman who is hard of hearing, it seems like a perfect fit. He can say whatever he wants to try to impress her. Thank goodness he has a good friend there to tone down his message.

Question 22

Who deals with a breakup by adopting a bunch of cats?

Breakups are never easy, and the characters on The Big Bang Theory have their share of relationship endings. One person in particular takes a breakup so badly that they end up adopting a bunch of cats. With names like Dr. Robert Oppenheimer, Enrico Fermi, Richard Feynman, Edward Teller, Otto Frisch and Zazzles, how could this character not get over their lost love? Which one of the characters on The Big Bang Theory dealt with a breakup by adopting a litter of cats?

Question 23

Who gets contacted by a high school bully?

Nobody ever said that being a geek was easy. And while the guys of The Big Bang Theory may have ended up leading successful, productive lives full of friendship, love and fun, we can't say that they had an easy go of things growing up. All of the guys experienced getting picked on in their younger days, but only one of them was contacted by a high school acquaintance. Jimmy Speckermen shows up one day not to apologize for his misdeeds, but to enlist one of the guys with an idea he had for an invention.

Question 24

Who falls in love with the Siri on his iPhone?

Given the guys' noted difficulties with dating women, it was perhaps a not-so-surprising turn of events when one of them bypasses human women altogether and begins a thing with the Siri application on his iPhone. She's helpful, listens to everything he says and affectionately refers to him as terms of endearment. What's not to love? And while other people in the gang may not understand his choice of mate, he doesn't care because he knows he and Siri have something special.

Question 25

Who gets to work with Stephen Hawking?

When distinguished scientist, Stephen Hawking comes to CalTech for an academic visit, he enlists the services of one of the Big Bang guys to maintain the equipment on his wheelchair. Stephen Hawking is, of course, one of Sheldon's idols and he begs for an introduction so that he can discuss his work on the Higgs boson particle. Naturally, Sheldon wraps his request inside of an insult and is promptly denied an introduction. But after careful consideration (and a bit of manipulation), Sheldon gets an introduction to the famed scientist.

Question 26

Who becomes Raj's hangout buddy when Howard goes to outer space?

Howard and Raj are exceptionally close best friends. And while Raj may have had a tough time adjusting to Howard's growing relationship with Bernadette, he had an even harder time getting used to his best buddy going all the way to outer space. Good thing he finds a new friend to spend time with in Howard's absence. Sheldon may have had some reservations about adding a new player to the friend group, but eventually he comes to accept Raj's new friend.

Question 27

Which couple dresses up like Smurfs for the Halloween party at the comic book store?

The guys of The Big Bang Theory are well-known for their love of cosplay, and what better time to dress up as their favorite characters than Halloween? When Stuart throws a big Halloween bash at the comic book store, they guys get their partners in on the cosplay action. And while some couples may have disagreed on their couples' costume (like, Amy and a creative, but unromantic Sheldon), they all show up to the party dressed to the nines, proving that the couple that slays together, stays together.

Question 28

Which Star Trek alum doesn't get along with Amy when he guests stars on the "Fun with Flags" podcast?

As the name would imply, "Dr. Sheldon Cooper and Dr. Amy Farrah Fowler Present: Dr. Sheldon Cooper's Fun with Flags" podcast teaches the world all about vexillology, the study of flags. But when they pair hosts a special Star Trek themed episode, complete with a Star Trek cast member, things begin to go awry when their guest star clashes with Amy's brash directorial style. When Sheldon doesn't take her side after their guest star insults her, the pair end up in a fight.

Question 29

Who practices hackey sack every day in the CalTech basement?

The guys of The Big Bang Theory all have their special quirks and hobbies. But when it is revealed that one of them spends twenty minutes every day locked in a room in the CalTech basement, the others take it upon themselves to figure out exactly what it is he is doing in there. And while he may have resorted to special effects to fool them into thinking that he created a wormhole and was exploring other dimensions, the real answer was much more simple: he was playing hackey sack.

Question 30

Who hires a graduate student to be his assistant?

One of the guys creates quite the stir among their girlfriends when he hires an attractive grad student to comb through his past research to see if there's anything Nobel Prize-worthy hiding in his old notebooks. When the Amy and Penny find out that "Alex" is not a guy, they worry that this new character might cause trouble in their relationships. Unfortunately for one couple on The Big Bang Theory, Alex does end up posing a problem, but who hired her in the first place?

Question 31

Whose mother wrote a tell-all book about them?

It makes sense that such accomplished scientists as the ones on The Big Bang Theory would come from equally accomplished parents. Unfortunately for one character, family accomplishments often come at their expense. Imagine growing up with a distinguished (and extremely distant) psychiatrist and neuroscientist for a mother who uses her child for experiments and later writes a revealing book titled "The Disappointing Child." Ouch. That's a hard one to get over. Whose mother wrote a tell-all book about their childhood?

Question 32

Whose girlfriend starts working at CalTech?

When one of the guys' girlfriends gets a gig at CalTech, it has a ripple effect on all of the couples. Is there such a thing as spending too much time together? The guys seem to think that working in such close proximity to their significant others is too much togetherness. But the girlfriend in question thinks it will be a nice change of pace. They can carpool to work and have lunch together. Conflict arises when he tells her that she can't work at CalTech.

Question 33

Who was once secretly married in Las Vegas?

What happens in Vegas, definitely does not always stay in Vegas. During an eventful Thanksgiving, this character on The Big Bang Theory reveals that they were secretly (and accidentally) married to an ex-flame at a quickie wedding chapel in Las Vegas by an Elvis impersonator. Their revelation understandably creates a conflict in their current relationship that is made worse when the ex-partner shows up for Thanksgiving dinner. Thankfully, both parties agree to sign the necessary court papers to get the sham marriage annulled.

Question 34

Who tries to create his own Comic Con?

When tickets to the real Comic Con sell out before the guys can buy them, one enterprising member of the group decides to create his very own convention. While the others attempt to secure tickets from a scalper, this character spends his day reaching out to celebrities (he rationalizes that since he sat through Iron Man 2, Robert Downey Jr. owes him at least 2 hours of his time). He eventually tracks down Darth Vader himself, James Earl Jones at a local sushi restaurant and has the time of his life.

Question 35

Who becomes a caretaker for Howard's mother?

Howard has always had a very close relationship with his mother, so when she needs a full-time caregiver, he assumes responsibility. This, of course, is not a desirable solution to his new wife, Bernadette, so the pair set out to find his mother a professional nurse. But with his mother's - let's say - challenging personality, they go through so many caregivers that they worry the agency won't send anymore. Fortunately, they find an ideal caretaker in an unlikely candidate.

Question 36

Who does Sheldon call to pick him up from the train station?

Sheldon was never good at handling changes. So, when he finds his professional track stalled, the comic book store burned down, and Penny and Leonard engaged to be married, he finds all of the changes to be too much. His solution? Hopping on a train and riding far, far away from Pasadena. It's too bad that the trip didn't turn out the way Sheldon expected and he ends up at a train station in Arizona with no pants, no shoes and one sock. Good thing he has good friends he call in his time of need.

Question 37

Who gets asked to throw out the first pitch at a Los Angeles Angels baseball game?

The guys of The Big Bang Theory aren't exactly known for for their athletic prowess. (That is, unless we count their third-place Griffith Park Quidditch team, which we absolutely should.) But when a professional achievement boosts one of the guys' profile and he gets asked to throw out the first pitch at a Los Angeles Angels game, it's all hands on deck to keep him from embarrassing himself at the televised baseball match. Thank goodness for good friends. And the Mars rover.

Question 38

Who gives Stuart the money to re-open his comic book store?

When The Comic Center of Pasadena burns down in a very unfortunate hot plate accident, its sad sack owner, Stuart Bloom, is even sadder when he finds that he does not have enough capital to re-open its doors because the insurance settlement check is much smaller than expected. However, in a wonderfully welcome turn of events, he gets a cash injection from a very unexpected source. Who gives Stuart the much needed money to re-open The Comic Center of Pasadena?

Question 39

Who's doctor girlfriend takes an instant disliking to Penny?

Penny may mooch off Leonard and Sheldon's WiFi and she may not always pitch in for takeout, but she's still a good friend and there when the guys need her. But when one of the guys starts dating a medical resident, Penny immediately picks up on a chill in the air. This sends her on a mission to find out why her guy pal's new gal doesn't like her and to try to make friends. In the end, the two women do make nice, on the surface, at least.

Question 40

Who does Raj go to work for when his father cuts off his allowance?

When Raj's wealthy father cuts off his allowance because of his out of control spending habits and perpetually single life, the astrophysicist finds himself unable to manage his sky-high credit card debt. Unfortunately for Raj, this development comes at Comic Con time, and he has to figure out a way to raise the cash to be able to go. Fortunately for him, he finds a part time job that lets him don his Aquaman costume while making a little extra money.

Question 41

Who gives the commencement address at their old high school?

The gang of friends on The Big Bang Theory includes so many accomplished scientists (and even an astronaut), so it was no big surprise that one of them was given the distinct honor of giving the commencement speech at their old high school. But when bad weather grounds their flight, that honor is suddenly in peril. Fortunately for the alum, they get a second chance at giving the speech. Donning a costume store graduation robe, they address the high school remotely via Skype.

Question 42

Who dates two women at the same time?

Dating never came easy to the guys of The Big Bang Theory, but that trend takes a sharp turn for the better for one of the guys in season nine when he starts dating two women at the same time - and he is very eager to let everyone else in the group know about it. Not too shabby for a guy who used to be so scared of women that he could not even speak to them without a cocktail in hand.

Question 43

Who forms a rock band?

When Stuart decides to have live music at the comic book store a few nights a week to give it that "staying in business kind of vibe," a pair of guys in the gang decide to form a band. Calling themselves "Footprints on the Moon," the duo immediately set out to write their first filk (folk music with sci-fi themes) song about the Norse god Thor battling Indiana Jones. The song may have made people think, but really what Stuart was looking for was something his customers could dance to.

Question 44

Who spies on Amy's date with Dave?

Sheldon and Amy may have eventually made it down the aisle, but their relationship was definitely not without its ups and downs. When Amy breaks it off with Sheldon after he displays insensitive behavior one too many times, she winds up going on a date with a tall, awkward man named Dave. Unbeknownst to Amy, a trio of her friends spend the evening spying on her date. That is, until they accidentally back into Dave's car trying to make a getaway.

Question 45

Which TV superhero do the guys get to make a cameo at Sheldon's birthday party?

When Amy suggests that Sheldon let the gang finally celebrate his birthday, he is understandably reluctant. After all, he grew up sharing his birthday with a twin sister who wasn't exactly kind when it came to celebrating their special day. In fact, she once told him that a certain television superhero was coming to their party and poor Sheldon spent the entire day waiting for a caped crusader who would never show. Good thing he grew up and gained friends who would go out of their way to make sure a superhero shows up to his party.

Question 46

Who does Sheldon hire to spend the day with Amy when he'd rather go to a movie?

It's no surprise that when Sheldon has to choose between going shopping with his girlfriend, Amy or attending a screening of the new Avengers movie complete with deleted scenes and Q&A session with Joss Wedon, it's see you later, Amy. And even though the guys offer to save him a space in line, he still chooses to ditch his girlfriend because obviously holding his spot would be a violation of line etiquette. Instead, he decides to outsource his boyfriend duties to a third-party.

Question 47

Who uses Howard and Bernadette's Jacuzzi when they go on "vacation"?

When Bernadette's morning sickness keeps the expectant couple from going on a planned trip to Palm Springs before the baby arrives, she and Howard decide to stay home on a secret vacation without telling their friends. But while they're relaxing at home, they are surprised to find some unexpected visitors partaking of their backyard Jacuzzi. Howard and Bernadette are initially amused; it's kind of like watching fish in at the aquarium, but eventually an annoyed Howard yells at the intruders to get their own spa.

Question 48

Who does Penny invite on a spa weekend when she feels her marriage is missing romance?

After Leonard spends one too many nights playing video games on the couch in his underwear, Penny starts to question whether he has given up in their marriage. She wants romance, and their relationship is sorely lacking in it - especially compared to newly co-habitating couple, Sheldon and Amy. So, to make a point to Leonard, she plans a spa weekend getaway and doesn't invite her husband. Eventually, the Hofstadters find an unexpected solution to their marital problems in a Relationship Agreement drawn up by Sheldon.

Question 49

Who does Raj move in with when he can no longer afford his apartment?

Life takes a turn for the worse for Raj when his wealthy father cuts off his allowance. He can't afford his sky-high credit card bills, he can't afford to go to Comic Con and he can no longer afford his apartment. Thankfully, he has a tight group of friends he can count on for a place to crash in his time of need. And while having Raj as a house guest may have created some tension, everyone can agree that they were glad he moved in.

Question 50

Who gets offered a fellowship at Princeton University?

With so many accomplished scientists in The Big Bang Theory group of friends, it was no surprise that one of them was offered a very prestigious position at Princeton University. It was an amazing opportunity, of course, but it also meant leaving behind their friends and romantic partner for an entire summer. It was an agonizing decision to have to make, but in the end, this accomplished scientist decides to take that prestigious post - with the complete support of their partner.

See Your Result
Questions Left
Current Score