The Extract Obliteration
Season 6, Ep. 6
A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.
First aired on November 1, 2012.
The Holographic Excitation
Season 6, Ep. 5
The gang heads to Stuart's comic book store to celebrate Halloween; Leonard uses science to seduce Penny.
First aired on October 25, 2012.
The Re-Entry Minimization
Season 6, Ep. 4
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
First aired on October 18, 2012.
The Higgs Boson Observation
Season 6, Ep. 3
Amy feels threatened by Sheldon's new assistant; Wolowitz starts to feel the pressures of being in space
First aired on Oct. 11.
The Decoupling Fluctuation
Season 6, Ep. 2
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard; Howard is picked on.
First aired on Oct. 4.
The Date Night Variable
Season 6, Ep. 1
Raj faces his loneliness when his friends are out on dates; while in space, Wolowitz gets drawn into a fight between Bernadette and his mom.
First aired on Sept. 27.
The Countdown Reflection
Season 5, Ep. 24
In the season finale, Howard and Bernadette decide to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding.
Original Air Date: May 10, 2012
The Launch Acceleration
Season 5, Ep. 23
NASA reschedules Howard's mission, putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.
Original Air Date: May 3, 2012
The Stag Convergence
Season 5, Ep. 22
Bernadette has second thoughts about marrying Howard when details of his sexual history emerge at his bachelor party.
Original Air Date: April 26, 2012
The Hawking Excitation
Season 5, Ep. 21
Sheldon is in seventh heaven and prepared to do whatever it takes to meet his science idol Stephen Hawking, who is working on a project with Wolowitz.
Original Air Date: April 5, 2012
The Transporter Malfunction
Season 5, Ep. 20
Raj may have found his soul mate after his parents set him up on a date. Meanwhile, Sheldon thinks he's going out of his mind when he begins hearing the voice of Spock (Leonard Nimoy) after he breaks Leonard's "Star Trek" collectible.
Original Air Date: March 29, 2012
The Weekend Vortex
Season 5, Ep. 19
Sheldon opts to spend a weekend playing video games with the guys instead of attending a birthday party for Amy's aunt.
Original Air Date: March 8, 2012
The Werewolf Transformation
Season 5, Ep. 18
After his barber is hospitalized, Sheldon undergoes a hair-raising change in lifestyle as his carefully planned daily routines are thrown for a loop. Meanwhile, Howard is up in the air about continuing his astronaut training.
Original Air Date: February 23, 2012
The Rothman Disintegration
Season 5, Ep. 17
Sheldon and Kripke square off in a series of sports-related competitions to win a coveted corner office at the university. Meanwhile, Penny feels uncomfortable accepting a gift from Amy.
Original Air Date: February 16, 2012
The Friendship Contraction
Season 5, Ep. 15
Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
Original Air Date: February 2, 2012
The Beta Test Initiation
Season 5, Ep. 14
Leonard and Penny experiment with dating, while Raj develops a peculiar relationship with his phone's virtual assistant.
Original Air Date: January 26, 2012
The Recombination Hypothesis
Season 5, Ep. 13
Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two.
Original Air Date: January 19, 2012
The Shiny Trinket Manoeuvre
Season 5, Ep. 12
Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children.
Original Air Date: January 12, 2012
The Speckerman Recurrence
Season 5, Ep. 11
Leonard must face his fears after being contacted by his high school tormentor.
Original Air Date: December 8, 2011
The Flaming Spittoon Acquisition
Season 5, Ep. 10
Sheldon considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.
Original Air Date: November 17, 2011
The Ornithophibia Diffusion
Season 5, Ep. 9
Leonard and Penny try hanging out alone, and Sheldon must overcome his fear of birds.
Original Air Date: November 10, 2011
The Isolation Permutation
Season 5, Ep. 8
Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her.
Original Air Date: November 3, 2011
Good Guy Fluctuation
Season 5, Ep. 7
An attractive comic book artist tests Leonard and Priya's relationship; Sheldon tries to scare his friends.
The Rhinitis Revelation
Season 5, Ep. 6
Sheldon finds himself competing with the gang for his mother's attention when she visits.View Gallery ►
The Wiggly Finger Catalyst
Season 5, Ep. 4
Raj meets a woman with whom he's able to talk.