The Big Bang Theory
About the Show
Arch-nerds Leonard and Sheldon may know more than their fair share about subatomic particles, but when it comes to people in general, and women in particular, they're absolutely clueless...
Series 5 Summary
This series brings the sound of wedding bells and more is discovered about the complicated lives of Sheldon, Leonard and their socially dysfunctional friends.
Episode 1 - The Skank Reflex Analysis
Penny worries that she's screwed things up with her friends after her night with Raj. Meanwhile Sheldon takes command of the paintball team.
Episode 2 - The Infestation Hypothesis
A battle of wills between Sheldon and Penny leaves Amy in the middle. Leonard tries to spice up his long-distance relationship with Priya.
Episode 3 - The Pulled Groin Extrapolation
Leonard goes as Amy's date to a colleague's wedding. Howard tries to convince Bernadette to live with his mum after they get married.
Episode 4 - The Wiggly Finger Catalyst
Raj is upset that he's the only one of the four guys not in a relationship, so Penny sets out to find him the perfect date.
Episode 5 - The Russian Rocket Reaction
Sheldon's old nemesis Wil Wheaton returns and invites everyone to a housewarming party. Sheldon threatens to 'de-friend' Leonard if he goes.
Episode 6 - The Rhinitis Revelation
Sheldon's mum visits and soon becomes a firm favourite with his friends, much to Sheldon's annoyance.
Episode 7 - The Good Guy Fluctuation
Leonard questions his feelings for Priya when he kisses a girl he meets in the comic book store.
Episode 8 - The Isolation Permutation
Amy is heartbroken when she finds out that Penny and Bernadette have been shopping for bridesmaids dresses without her.
Episode 9 - The Ornithophobia Diffusion
Leonard and Penny attempt to hang out without anybody else around, while Sheldon faces his fear of birds.
Episode 10 - The Flaming Spittoon Acquisition
Stuart from the comic book shop asks Amy out on a date. In jealousy, Sheldon asks her to be his girlfriend.
Episode 11 - The Speckerman Recurrence
Leonard confronts the man who bullied him in high school, while Penny realises she did her fair share of tormenting in the past.
Episode 12 - The Shiny Trinket Maneuver
The Shiny Trinket Maneuver: When Sheldon is dismissive of Amy's career, Penny, Raj and Leonard teach him that sometimes it's a good idea to pretend to care about things.
Episode 13 - The Recombination Hypothesis
The Recombination Hypothesis: In the 100th episode of the US sitcom, Leonard and Penny agree to give their relationship another chance, but they soon start to argue again.
Episode 14 - The Beta Test Initiation
The Beta Test Initiation: Leonard and Penny put their relationship through a 'beta test' and report problems they have with each other as 'bugs', while Sheldon and Amy seek internet fame.
Episode 15 - The Friendship Contraction
The Friendship Contraction: After Sheldon keeps him awake all night, an irate Leonard decides that he needs to break the roommate agreement, which formally ends their friendship.
Episode 16 - The Vacation Solution
The Vacation Solution: Sheldon helps Amy in her biology lab after he is forced to use up two weeks of holiday, but he is bored by the tasks she gives him.
Episode 17 - The Rothman Disintegration
The Rothman Disintegration: Sheldon and Kripke argue over who should get Professor Rothman's vacant corner office. Amy buys Penny some art to celebrate their friendship.
Episode 18 - The Werewolf Transformation
The Werewolf Transformation: Sheldon's well-organised world is turned upside down when he learns that the barber who has cut his hair for years has passed away.
Episode 19 - The Weekend Vortex
The Weekend Vortex: Amy is upset when Sheldon breaks his promise to accompany her to her aunt's birthday party in order to join the guys for a video game marathon.
Episode 20 - The Transporter Malfunction
The Transporter Malfunction: Penny buys Leonard and Sheldon some Star Trek memorabilia but she is irked when they refuse to remove the toys from their packaging.
Episode 21 - The Hawking Excitation
The Hawking Excitation: When Stephen Hawking comes to lecture at the university, Howard is given the task of maintaining his wheelchair, making Sheldon green with envy.
Episode 22 - The Stag Convergence
The Stag Convergence: Leonard, Sheldon and Raj throw a bachelor party for Howard, during which some stories about his sexual history are accidentally revealed.
Episode 23 - The Launch Acceleration
The Launch Acceleration: When NASA informs Howard that his space mission has been rescheduled to an earlier date, he tries to use the wedding as an excuse not to go.
Episode 24 - The Countdown Reflection
The Countdown Reflection: In the last episode of season five, Bernadette decides that she wants to get married to Howard before his NASA space mission takes place.
The Big Bang Theory synopsis
Arch-nerds Leonard and Sheldon may know more than their fair share about subatomic particles, but when it comes to people in general, and women in particular, they're absolutely clueless...Episode Guide >
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