Watch The Big Bang Theory

Leonard, Sheldon, Raj, and Howard aren't your average Pasadena post-grads. They are, each in his own right, geniuses, which makes for an interesting storm of nerdy antics and comical conundrums. Socially awkward, romantically-challenged, and professionally driven, the four stars play out more like brainy boys.

Monday 8:00 pm et/pt on CBS
10 Seasons, 217 Episodes - Currently Airing
September 24, 2007
Comedy
8.4/10
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The Big Bang Theory Full Episode Guide

  • Sheldon and Leonard must separate their stuff and remove Penny's things from 4B.

  • Sheldon is green with envy when Bert, a Caltech geologist, wins the MacArthur Genius fellowship. Also, Wolowitz finds an old remote control Stephen Hawking action figure he invented.

  • Following a successful experiment combining their genes, Sheldon is determined to convince Amy they should procreate. Also, Koothrappali is ashamed to tell the gang the occupation of his new girl.

  • Amy lies to Sheldon so she can still live with him. Later, they host an "on location" episode of "Fun With Flags" in Penny‚Äôs apartment.

  • Penny is pleasantly surprised when she discovers she has fans of her performance in "Serial Ape-ist." Also, Amy hosts a Sheldon-style brunch at Penny's apartment, and Wolowitz gets spontaneous.

  • When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Also, Howard and Bernadette are upset when Koothrappali learns the gender of the baby before they do.

  • Sheldon can't keep up with the late nights Howard and Leonard are putting in, Raj spends the day with a pregnant Bernadette and Penny and Amy attend a faculty party.

  • The Air Force shows interest in the guidance system and Penny lets it slip at work that Bernadette is expecting.

  • A night of revelry and bad decisions on behalf of the guys' parents results in an awkward morning. Penny's dysfunctional family is in town as well; chaos ensues.

  • Leonard and Penny get remarried in front of their friends. Meanwhile, chaos erupts when Leonard's parents and Sheldon's mother make a connection. Howard gets a cryptic email from the Air Force about his invention.

  • Sheldon hires Stuart to spend the day with Amy so he can attend a movie screening. Meanwhile, Leonard's mother visits and Penny struggles to make a connection with her.

  • Sheldon and Bernadette skip out when the group goes wine tasting.

  • A Game of Thrones viewing party takes an unexpected turn.

  • Sheldon, Amy, Leonard and Penny head to Big Bear for a getaway together. Meanwhile Raj intervenes in Bernadette and Howard's baby discussion.

  • Amy gets Sheldon a new laptop, but is shocked by his reaction. Koothrappali tattles on Leonard and Wolowitz after they lie to their wives in order to attend an early screening of a movie.

  • Sheldon draws up a contract that explains how they will divide their portion of their guidance system invention royalties, but Bernadette doesn't agree with it. Raj must again decide between Emily and Claire when they both contact him.

  • The gang finally celebrates Sheldon's birthday after nine years of friendship and gives him the surprise of his life.

  • Bernadette is surprised by Howard's reaction to news he's going to be a father. How will everyone else react?

  • Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny struggle with aging, Howard and Bernadette find a surprise in their hot tub and Raj is torn between his feelings for Emily and the cute girl he met at the Comic Bookstore.

  • Sheldon is excited when his Meemaw comes to visit, but things quickly go south when she clashes with Amy. Also, Raj meets a new girl at the comic book store who makes him doubt his relationship with Emily.

  • Leonard, Penny and the gang decide to treat themselves to a Sheldon-free weekend after dealing with him when he's sick.

  • Leonard sees a psychiatrist for Penny. Also, Sheldon and Koothrappali collaborate on an astronomical discovery.

  • Sheldon and Amy have been together for half a decade and finally spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.

  • No one knows the song that is constantly playing in Sheldon's head, but it reminds him of Amy and he has an epiphany. Meanwhile, Amy reenters the dating game.

  • Sheldon and Amy hang out as friends on Thanksgiving at the aquarium. Meanwhile, Wolowitz is hesitant to volunteer at the soup kitchen with Bernadette.

  • Leonard, Penny and Bernadette spy on Amy, who has a date. Sheldon leaves it up to Howard and Raj to help him find a new girlfriend since they found Amy for him.

  • During an interview for a documentary about Spock from "Star Trek," Sheldon struggles to keep his emotions in check in the wake of his recent break-up with Amy.

  • In the middle of a national helium shortage, Sheldon and Leonard act aggressively to find the supplies they need. In addition, Penny and Bernadette search for a new boyfriend for Amy by downloading a dating app on her phone.

  • The boys take a fencing class from Barry Kripke and Sheldon gets uncomfortable when Kripke shows interest in Amy. Penny, Amy, and Bernadette stop by the Comic Book Store to help Stuart gain girl customers.

  • Sheldon chooses to revert to the year 2003 after he hears about an alteration in his living situation. Meanwhile, Howard and Raj put together a band to perform at the Comic Book Store.

  • The guys try to go on a surprise belated bachelor-party for Leonard to Mexico. The girls rely on Penny to let her family know about her and Leonard eloping.

  • Leonard talks to the girl he kissed on the North Sea in order to comfort Penny. Meanwhile, Sheldon shoots an episode of "Fun with Flags" after he splits up with Amy, and keeping a secret from Penny makes Bernadette feel guilty.

Most Popular The Big Bang Theory Episodes

  • Season 10 Episode 10 The Property Division Collision 12/01/2016
  • Season 10 Episode 9 The Geology Elevation 11/17/2016
  • Season 10 Episode 1 The Conjugal Conjecture 9/19/2016
  • Season 1 Episode 1 Pilot 9/24/2007
  • Season 10 Episode 8 The Brain Bowl Incubation 11/10/2016

The Big Bang Theory News

Young Sheldon to Star in 'Big Bang Theory' Spin-Off

If you've been dying to know what Sheldon Cooper was like as a kid, you'll eventually be able to find out. A new spin-off prequel to TV's most beloved comedy is on the way.

'Big Bang Theory' Gets a (Last?) Season Premiere Date

The series might not return after the upcoming season, but at least now we know when season 10 will begin.

'Big Bang Theory' Season Finale: Another Wedding?

The Big Bang Theory's season 9 has been all about nuptials, from the beginning to the end. The season-ending wedding ceremony promises to be bigger and better than the one that began the season.

Kaley Cuoco Not Leaving 'Big Bang Theory'

Sometimes it's hard to know who to believe, but when it comes to choosing between rumors and Kaley Cuoco herself, you should probably choose Kaley.

Really Big Bang: Sheldon and Amy Go All the Way

Few characters on TV are as pure and innocent as Sheldon Cooper, at least for now. That will change in a few weeks, though.

Big Bang Divorce: Kaley Cuoco and Husband Split

In the land of make-believer, Kaley Cuoco is experiencing marital bliss. In real life, not so much.

Big Bang Wedding Wins the Night, Blindspot Draws a Crowd

As the fall TV season starts to roll out, it looks like CBS' Monday-night line-up is the one to beat. NBC, though, might just turn at least part of the night into a real battle.

Big Bang Wedding: It's Going to Happen

Have you been worried that Leonard and Penny aren't actually going to be get married? According to The Big Bang Theory's showrunner, you shouldn't be.

'Big Bang Theory' Season 8 Preview: Sheldon's Back

Get your first look at the new season of "The Big Bang Theory" with this preview clip!

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The Big Bang Theory Video Clips & Extras

Checkmate Clip (02:26) Easier To Fight Then To Phase The Feelings Clip (02:37) Private Butlers Clip (01:48) The Property Division Collision Preview (00:21) Stuart And Raj Battle To Be The Better Friend On The Big Bang Theory Clip (01:05) The Property Division Collision (Preview) Clip (00:31) The Property Division (Sneak Peek) Clip (00:52) Visualize Your Anger Clip (01:59)