100+ Big Bang Theory Trivia Questions with Answers to Test True Fans

So, you’re looking for some fun Big Bang Theory trivia? Well, you’ve come to the right place! I’ve been a huge fan of the show since it first aired and have probably watched each episode at least three times (yes, even the later seasons!).

Whenever my friends come over for game night, I love throwing in some TV show trivia, and The Big Bang Theory questions always get everyone laughing and reminiscing about Sheldon’s quirks or Howard’s pickup lines. Whether you’re planning a themed party, looking to test your knowledge, or just wanting to relive some of the show’s best moments, these questions will definitely do the trick!

I’ve put together over 100 trivia questions covering everything from basic character facts to obscure references that only true fans will catch. Let’s get started with some bazinga-worthy trivia!

The Big Bang Theory ran for an impressive 12 seasons from 2007 to 2019, following the lives of socially awkward physicists Leonard and Sheldon, their friends Howard and Raj, and their neighbor Penny. What started as a show about science geeks eventually evolved into a heartwarming story about friendship, love, and growth that captured millions of viewers worldwide.

With its unique blend of nerd culture, scientific references, and relatable relationship dynamics, The Big Bang Theory created a treasure trove of memorable moments perfect for trivia. From Sheldon’s catchphrases to Penny’s acting career struggles, there’s something for every fan to test their knowledge on.

Basic Character Questions

Let’s start with some easy questions about our favorite characters. Even if you’ve only seen a few episodes, you might know these!

What is Sheldon Cooper’s middle name? Answer: Lee
What is Penny’s last name before she gets married? Answer: It was never revealed in the show
What university do Sheldon and Leonard work at? Answer: Caltech (California Institute of Technology)

What is Howard Wolowitz’s job? Answer: Aerospace engineer
Which character has a PhD in astrophysics? Answer: Rajesh Koothrappali
What instrument does Sheldon play? Answer: Theremin

What is the name of Howard’s mother? Answer: Debbie Wolowitz
Which character is lactose intolerant? Answer: Leonard Hofstadter
What is Amy Farrah Fowler’s field of study? Answer: Neurobiology

Where does Penny work when she first meets Leonard and Sheldon? Answer: The Cheesecake Factory
What is Bernadette’s maiden name? Answer: Rostenkowski
What state is Sheldon originally from? Answer: Texas

What does Stuart own? Answer: A comic book store
What is Leonard’s mother’s profession? Answer: Neuroscientist and psychiatrist
What is Raj’s sister’s name who dates Leonard briefly? Answer: Priya

What is the name of Sheldon’s twin sister? Answer: Missy
Which character becomes an astronaut? Answer: Howard Wolowitz
What is Sheldon’s favorite spot in the apartment? Answer: The left side of the couch

What is Leonard’s middle name? Answer: Leakey
What language does Howard claim to speak, but actually can’t? Answer: Klingon

If you enjoyed testing your knowledge about these lovable characters, you might also be interested in exploring deep questions to ask a girl for more meaningful conversations.

Relationships and Love Lives

The romantic relationships on The Big Bang Theory provided some of the most heartwarming and hilarious moments of the series. Let’s see how well you remember the love lives of our favorite characters!

Who was Leonard’s first girlfriend on the show? Answer: Leslie Winkle
In which season do Leonard and Penny get married? Answer: Season 9

How did Sheldon and Amy first meet? Answer: Through an online dating site (set up by Howard and Raj)
Who does Raj date that is deaf? Answer: Emily Sweeney (not to be confused with the other Emily he dated)
What was Howard and Bernadette’s first date? Answer: They went to dinner at the Cheesecake Factory

In which season do Sheldon and Amy first kiss? Answer: Season 7
Who officiates Leonard and Penny’s wedding ceremony? Answer: Bernadette
Which character dated a girl named Lucy who had severe social anxiety? Answer: Raj

What caused Leonard and Penny’s first breakup? Answer: Leonard said “I love you” too soon and Penny wasn’t ready
Which of Howard’s relatives does Raj have a crush on? Answer: His cousin Jeanie
What gift does Sheldon give Amy for her birthday that leads to their first sleepover? Answer: A night of intimacy (they sleep together for the first time)

Who does Stuart briefly date that upsets Howard? Answer: Howard’s mother Debbie
In which state do Sheldon and Amy get married? Answer: California
What is the name of Penny’s ex-boyfriend who was a recurring character? Answer: Zack Johnson

What is written on the DNA locket Howard gives Bernadette? Answer: “You’ve given my life meaning and purpose”
Who is Leonard dating when he first kisses Penny? Answer: Priya Koothrappali
What is the name of Raj’s dog that he treats like his child? Answer: Cinnamon

How did Howard propose to Bernadette? Answer: With help from the other guys during a magic trick
What does Amy call Sheldon in their relationship agreement? Answer: Her boyfriend
In the final episode, who announces they’re pregnant? Answer: Penny

Looking for more relationship questions like these? Check out these fun and silly questions to ask your boyfriend for a playful conversation.

Sheldon Cooper Special

Sheldon is arguably the most iconic character from The Big Bang Theory, with his unique quirks and memorable catchphrases. This section is dedicated entirely to the brilliant but socially challenged physicist!

What is Sheldon’s catchphrase? Answer: Bazinga!

What is Sheldon’s favorite superhero? Answer: The Flash
What does Sheldon consider the perfect temperature for tea? Answer: 183°F
How does Sheldon greet Penny’s grandmother? Answer: “Hello, old woman”

What game did Sheldon invent? Answer: Three-person chess
When is Sheldon’s birthday? Answer: February 26, 1980
What is the name of Sheldon’s childhood nemesis? Answer: Wil Wheaton

What is Sheldon’s IQ? Answer: 187
What song does Sheldon sing to comfort himself when he’s sick? Answer: “Soft Kitty”
What does Sheldon consider the worst breach of roommate etiquette? Answer: Sitting in his spot

What is Sheldon’s favorite hot beverage? Answer: Tea
What does Sheldon say is the most common cause of accidents in the home? Answer: Faulty wiring
How many knocks does Sheldon do before entering a room? Answer: Three knocks, followed by the person’s name, repeated three times

What is Sheldon’s fear? Answer: Birds
What does Sheldon call the regular gathering of his friends at his apartment? Answer: “Social group”
What is Sheldon’s “safe word” for when he’s feeling overwhelmed? Answer: “Cantaloupe”

At what age did Sheldon receive his first PhD? Answer: 16
What train does Sheldon ride during his cross-country trip in Season 7? Answer: The Coast Starlight
What does Sheldon put in his contract that Leonard has to drive him to? Answer: The comic book store, the train store, and the dentist

What Nobel Prize does Sheldon eventually win? Answer: Physics

If you’re fascinated by deep thinkers like Sheldon, you might enjoy exploring these philosophical questions that challenge your perspective.

Scientific References

The Big Bang Theory is known for incorporating real scientific concepts into the show. Let’s test your knowledge of the science behind the comedy!

What field of physics do Sheldon and Leonard primarily work in? Answer: Experimental physics (Leonard) and theoretical physics (Sheldon)
What experiment was Sheldon conducting that got him fired from the university in Season 7? Answer: Monopole research in the Arctic
What material is Leonard researching in his lab when he meets Penny for the first time? Answer: High-powered lasers in supercooled helium

What is the name of the space toilet Howard designs for NASA? Answer: The Wolowitz Zero-Gravity Waste Disposal System
What is the study of flags called, which Sheldon is enthusiastic about? Answer: Vexillology
What scientific mishap occurred when Howard’s space toilet malfunctioned? Answer: It created a waste disposal incident on the International Space Station

What instrument does Sheldon use to measure brain activity in one episode? Answer: EEG (Electroencephalogram)
What theory does Sheldon develop with Amy that they eventually win a Nobel Prize for? Answer: Super Asymmetry
What does the acronym CERN stand for, where Howard worked temporarily? Answer: European Organization for Nuclear Research

What string theory concept does Sheldon frequently discuss? Answer: M-theory
What is the name of the planet Howard and Raj discover? Answer: Planet 2008-NQ17 (or “Planet Bollywood”)
What substance does Amy study that affects behavior in her lab? Answer: Nicotine addiction in primates

What scientific equipment does Leonard damage while trying to impress Penny? Answer: The helium-neon laser
What is the “Higgs boson” that the characters frequently reference? Answer: An elementary particle in physics, sometimes called “the God particle”
What quantum mechanics principle states that certain pairs of physical properties cannot be simultaneously known? Answer: Heisenberg’s Uncertainty Principle

What does Sheldon propose as the “26th dimension” in string theory? Answer: Time
What formula does Sheldon say will help Leonard and Howard re-create their enjoyable Arctic conditions? Answer: Cp = ΔH/ΔT (specific heat capacity formula)
What agency did Howard work for as an astronaut? Answer: NASA

What does Bernadette research at her pharmaceutical company? Answer: Biological agents and diseases
What does Stephen Hawking point out as the mathematical error in Sheldon’s paper? Answer: An arithmetic error on page 2

For those who enjoy mathematical challenges like our Big Bang Theory physicists, you might want to check out these math trivia questions to test your numerical knowledge.

Pop Culture and Geek References

The Big Bang Theory is filled with references to comic books, science fiction, fantasy, and other elements of geek culture. Let’s explore some of the show’s best pop culture moments!

What is the name of the comic book store where the guys frequently hang out? Answer: The Comic Center of Pasadena
Which superhero costume does Sheldon wear the most frequently? Answer: The Flash

What day of the week is new comic book day? Answer: Wednesday
Which Star Trek character does Sheldon dress up as for a costume party? Answer: Spock
What online game do the guys play together? Answer: World of Warcraft

What is Sheldon’s favorite Star Trek series? Answer: The Original Series
Who is Sheldon’s favorite Batman actor? Answer: Adam West
What card game do the guys often play? Answer: Mystic Warlords of Ka’a

What sci-fi movie does Sheldon say Leonard spoiled for him? Answer: Star Wars: The Empire Strikes Back
Which famous scientist makes the most appearances on the show? Answer: Stephen Hawking
What is the name of the sci-fi movie written by Penny’s ex-boyfriend? Answer: Serial Ape-ist

Which Indiana Jones film does Sheldon say “finally nuked the fridge”? Answer: Kingdom of the Crystal Skull
What board game created by Wil Wheaton does the group play? Answer: Titans of Astronomy
Which Star Wars movie was released the same year TBBT began? Answer: None (2007 was between Episode III and Episode VII)

Which superhero does Howard dress as that Sheldon criticizes for being “only a rich kid with issues”? Answer: Batman
What language did the guys learn to attend a screening of “The Lord of the Rings”? Answer: Elvish
What science fiction franchise does Sheldon boycott after the creator snubbed him? Answer: Firefly

What collectible card game does Stuart teach Sheldon and Amy to play? Answer: Dungeons & Dragons
What costume does Sheldon wear to the Renaissance Fair? Answer: Spock
Which Star Wars character does Sheldon say he would be? Answer: R2-D2

If these geeky trivia questions got you excited, you might also enjoy challenging your friends with these video game trivia questions at your next game night.

Episode-Specific Questions

Let’s get into some specific episodes and memorable moments from throughout the series!

In which episode does Sheldon first say “Bazinga”? Answer: “The Einstein Approximation” (Season 3, Episode 14)

What is the title of the final episode? Answer: “The Stockholm Syndrome”
Which character sings “Sweet Kitty” instead of “Soft Kitty” to Sheldon? Answer: Penny
In which episode do the guys go to the North Pole? Answer: “The Monopolar Expedition” (Season 2 finale)

What does Sheldon give Penny for Christmas that makes her cry? Answer: A napkin signed by Leonard Nimoy
In which episode does Howard return from space? Answer: “The Re-Entry Minimization” (Season 6, Episode 4)
What song does Sheldon sing to Howard on the anniversary of him going to space? Answer: “Rocket Man” by Elton John

In which episode does Sheldon try to increase his cognitive abilities by eating fish? Answer: “The Luminous Fish Effect” (Season 1, Episode 4)
What happens to the elevator in the building? Answer: It was broken by one of Leonard’s experiments
In which episode does Sheldon move to Bozeman, Montana? Answer: “The Bozeman Reaction” (Season 3, Episode 13)

What is the name of the episode where Sheldon creates a mind-reading device? Answer: “The Friendship Algorithm”
What alcoholic drink does Penny introduce Sheldon to that he becomes fond of? Answer: Long Island Iced Tea
In which episode does Leonard’s mother kiss Sheldon? Answer: “The Maternal Congruence” (Season 3, Episode 11)

What is the title of the episode where the guys go to a cabin that once belonged to Richard Feynman? Answer: “The Feynman Excitation” (fictional episode – trick question)
In which episode does Sheldon try to make friends with Barry Kripke for access to a computer? Answer: “The Friendship Algorithm” (Season 2, Episode 13)

For more fun conversation topics like these memorable TV moments, check out these interesting topics to talk about to liven up any gathering.

Behind the Scenes

Let’s wrap up with some fascinating behind-the-scenes trivia about the show and its production!

Which actor has a PhD in neuroscience in real life? Answer: Mayim Bialik (Amy)
How many seasons did The Big Bang Theory run for? Answer: 12 seasons

Which character was not in the original pilot? Answer: Howard and Raj (both were added after the unaired pilot)
Which two cast members dated in real life? Answer: Johnny Galecki (Leonard) and Kaley Cuoco (Penny)
What was the working title of the show before it became “The Big Bang Theory”? Answer: “Lenny, Penny and Kenny”

Who is the only main cast member to appear in every single episode? Answer: Johnny Galecki (Leonard) and Jim Parsons (Sheldon)
Which famous scientist consulted on the show to ensure scientific accuracy? Answer: David Saltzberg
What is the name of the spin-off prequel series about Sheldon’s childhood? Answer: Young Sheldon

Which famous TV show did Jim Parsons (Sheldon) turn down a role in to continue with TBBT? Answer: ER
What was the highest salary the main cast members earned per episode in later seasons? Answer: $1 million per episode

For more behind-the-scenes type questions to use at your next gathering, try these how well do you know me questions with your friends.

Why Big Bang Theory Trivia is Perfect for Fans

There’s something special about Big Bang Theory trivia that brings fans together. I remember hosting a watch party for the series finale where we played Big Bang Theory trivia during commercial breaks. Even my mom, who had only seen a handful of episodes, was laughing along and getting some answers right!

This trivia is perfect for:

Testing who the true “Sheldon” of your friend group is (you know, the one who remembers every trivial detail)

Breaking the ice at parties with fellow fans
Settling debates about what actually happened in certain episodes
Simply appreciating how much thought went into the show’s scientific and pop culture references

The best part is that even casual viewers can enjoy answering the easier questions while die-hard fans can show off their knowledge with the more challenging ones. It’s both entertaining and a great way to appreciate the clever writing that made the show so successful.

Final Thoughts

Well, there you have it – over 100 questions to test even the most dedicated Big Bang Theory fans! How did you do? Were you a Leonard (pretty good), a Sheldon (perfect score), or more of a Penny (just getting by with the basics)?

I find that Big Bang Theory trivia is perfect for parties, game nights, or just for personal entertainment when you’re missing the show. My family still quotes Sheldon’s “Bazinga!” at unexpected moments, and these trivia questions bring back all those fun memories of watching the show together.

Did you know all the answers, or were there some surprises in there? I’d love to know which questions stumped you and which ones you found too easy! Feel free to use these questions at your next gathering or to challenge fellow fans online.

Looking for more trivia fun? Check out our other trivia collections or explore more questions for your next get-together. The universe of trivia is expanding – just like our actual universe, as Sheldon would be quick to point out!