The Big Bang Theory

The Hofstadter Insufficiency. Leonard is away at sea, so Sheldon and Penny spend time together and spill some revealing secrets. Howard comes to Raj's aid after a breakup. S7, Ep1

The Bon Voyage Reaction. When Leonard is offered an exciting new job opportunity overseas, Sheldon grows jealous. Raj pushes Lucy a little too far in their relationship. S6, Ep24

The Hofstadter Insufficiency. Leonard is away at sea, so Sheldon and Penny spend time together and spill some revealing secrets. Howard comes to Raj's aid after a breakup. S7, Ep1

The Deception Verification. Leonard returns from his expedition and finds things chilly between him and Sheldon, and Howard faces questions about his masculinity. S7, Ep2

The Speckerman Recurrence. Leonard must face his fears after being contacted by his high school tormentor, while Penny realises that she might have been a bully herself. S5, Ep11

The Shiny Trinket Maneuver. Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard deals with Bernadette's dislike of children. S5, Ep12

The Recombination Hypothesis. Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series. S5, Ep13

The Shiny Trinket Maneuver. Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard deals with Bernadette's dislike of children. S5, Ep12

The Recombination Hypothesis. Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series. S5, Ep13

The Beta Test Initiation. Leonard and Penny experiment with dating again by 'beta testing' their relationship. Raj develops a weird bond with his phone's virtual assistant. S5, Ep14

The Rothman Disintegration. When a corner office at the university opens, Sheldon must compete for it with his office nemesis, Barry Kripke. Penny gets an unusual gift from Amy. S5, Ep17

The Werewolf Transformation. A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Howard rethinks his decision to go into space. S5, Ep18

The Rothman Disintegration. When a corner office at the university opens, Sheldon must compete for it with his office nemesis, Barry Kripke. Penny gets an unusual gift from Amy. S5, Ep17

The Werewolf Transformation. A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Howard rethinks his decision to go into space. S5, Ep18

The Weekend Vortex. Sheldon chooses to participate in a guys-only weekend Star Wars gaming marathon rather than go with Amy to her aunt's birthday party. S5, Ep19

The Stag Convergence. Howard's wedding plans are in jeopardy after the guys throw him a bachelor party, and details of his sexual history are leaked online. S5, Ep22

The Launch Acceleration. When NASA reschedules Howard's mission and puts his wedding plans in jeopardy, he's forced to face his fears - and Bernadette's dad. S5, Ep23

The Stag Convergence. Howard's wedding plans are in jeopardy after the guys throw him a bachelor party, and details of his sexual history are leaked online. S5, Ep22

The Date Night Variable. Howard discovers that he can't escape his mother - even in space! Back on earth, meanwhile, Raj turns his existence as a third wheel into an art form. S6, Ep1

The Decoupling Fluctuation. After learning Penny is thinking about breaking up with Leonard, Sheldon tries to intervene. Howard is being picked on in space by the astronauts. S6, Ep2

The Date Night Variable. Howard discovers that he can't escape his mother - even in space! Back on earth, meanwhile, Raj turns his existence as a third wheel into an art form. S6, Ep1

The Decoupling Fluctuation. After learning Penny is thinking about breaking up with Leonard, Sheldon tries to intervene. Howard is being picked on in space by the astronauts. S6, Ep2

The Holographic Excitation. The gang celebrates Halloween at Stuart's comic book store. Leonard and Penny discover a new spark in their relationship with a scientific seduction. S6, Ep5

The Re-Entry Minimization. When Howard returns from space, he doesn't get the hero's welcome he expected. Meanwhile, Game Night turns into a battle of the sexes. S6, Ep4

The Holographic Excitation. The gang celebrates Halloween at Stuart's comic book store. Leonard and Penny discover a new spark in their relationship with a scientific seduction. S6, Ep5

The Extract Obliteration. Sheldon's friendship with renowned scientist Stephen Hawking is threatened by a game of 'Words with Friends.' S6, Ep6

The Habitation Configuration. Bernadette pressures Howard to move out of his mother's house. Sheldon finds himself caught in the middle of a fight between Amy and Wil Wheaton. S6, Ep7

The 43 Peculiarity. Howard and Raj try to understand why Sheldon disappears every afternoon at 2:45. Leonard and Penny wrestle with jealousy in their relationship. S6, Ep8

The Habitation Configuration. Bernadette pressures Howard to move out of his mother's house. Sheldon finds himself caught in the middle of a fight between Amy and Wil Wheaton. S6, Ep7

The 43 Peculiarity. Howard and Raj try to understand why Sheldon disappears every afternoon at 2:45. Leonard and Penny wrestle with jealousy in their relationship. S6, Ep8

The Santa Simulation. Sheldon unwillingly revisits some Christmas memories during a lively game of Dungeons and Dragons, while Raj joins the girls for ladies' night out. S6, Ep11

The Fish Guts Displacement. Sheldon plays nursemaid to a sick Amy, while Howard attempts to bond with his father-in-law on an upcoming fishing trip. S6, Ep10

The Santa Simulation. Sheldon unwillingly revisits some Christmas memories during a lively game of Dungeons and Dragons, while Raj joins the girls for ladies' night out. S6, Ep11

The Cooper/Kripke Inversion. Outraged that he's being forced to work with his university nemesis, Barry Kripke, Sheldon faces a crisis of conscience. S6, Ep14

The Spoiler Alert Segmentation. When Sheldon and Leonard fight, it affects Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is away. S6, Ep15

The Tangible Affection Proof. While the guys try to give their significant others the perfect Valentine's Day, Raj and Stuart throw a lonely people party at the comic book store. S6, Ep16

The Spoiler Alert Segmentation. When Sheldon and Leonard fight, it affects Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is away. S6, Ep15

The Tangible Affection Proof. While the guys try to give their significant others the perfect Valentine's Day, Raj and Stuart throw a lonely people party at the comic book store. S6, Ep16

The Closet Reconfiguration. When Howard finds a letter from his father, he's forced to confront his past. And Leonard and Penny throw a grown-up cocktail party at the apartment. S6, Ep19

Contractual Obligation Implementation. Leonard, Sheldon and Howard try to advance the cause of women in science by speaking with junior high girls about their future careers. S6, Ep18

The Closet Reconfiguration. When Howard finds a letter from his father, he's forced to confront his past. And Leonard and Penny throw a grown-up cocktail party at the apartment. S6, Ep19

The Proton Resurgence. Leonard and Sheldon hire Professor Proton, the host of their favourite childhood TV show, to perform. Raj leaves his dog with Howard and Bernadette. S6, Ep22

The Closure Alternative. After one of his favourite TV shows gets cancelled too soon, Sheldon feels lost, so Amy tries to help him get over his compulsive need for closure. S6, Ep21

The Proton Resurgence. Leonard and Sheldon hire Professor Proton, the host of their favourite childhood TV show, to perform. Raj leaves his dog with Howard and Bernadette. S6, Ep22

The Love Spell Potential. When the girls' trip to Vegas falls through, the guys invite them to a Dungeons & Dragons date. Meanwhile, Raj and Lucy go on an awkward date. S6, Ep23

The Bon Voyage Reaction. When Leonard is offered an exciting new job opportunity overseas, Sheldon grows jealous. Raj pushes Lucy a little too far in their relationship. S6, Ep24

The Closet Reconfiguration. When Howard finds a letter from his father, he's forced to confront his past. And Leonard and Penny throw a grown-up cocktail party at the apartment. S6, Ep19

The Tenure Turbulence. Let the battle begin! Leonard, Sheldon and Raj fight for tenure at the University - and the competition heats up when the girls get involved! S6, Ep20

The Closet Reconfiguration. When Howard finds a letter from his father, he's forced to confront his past. And Leonard and Penny throw a grown-up cocktail party at the apartment. S6, Ep19

The Proton Resurgence. Leonard and Sheldon hire Professor Proton, the host of their favourite childhood TV show, to perform. Raj leaves his dog with Howard and Bernadette. S6, Ep22

The Closure Alternative. After one of his favourite TV shows gets cancelled too soon, Sheldon feels lost, so Amy tries to help him get over his compulsive need for closure. S6, Ep21

The Proton Resurgence. Leonard and Sheldon hire Professor Proton, the host of their favourite childhood TV show, to perform. Raj leaves his dog with Howard and Bernadette. S6, Ep22

The Hofstadter Insufficiency. Leonard is away at sea, so Sheldon and Penny spend time together and spill some revealing secrets. Howard comes to Raj's aid after a breakup. S7, Ep1

The Bon Voyage Reaction. When Leonard is offered an exciting new job opportunity overseas, Sheldon grows jealous. Raj pushes Lucy a little too far in their relationship. S6, Ep24

The Hofstadter Insufficiency. Leonard is away at sea, so Sheldon and Penny spend time together and spill some revealing secrets. Howard comes to Raj's aid after a breakup. S7, Ep1

The Deception Verification. Leonard returns from his expedition and finds things chilly between him and Sheldon, and Howard faces questions about his masculinity. S7, Ep2

The Scavenger Vortex. Raj puts together a scientific scavenger hunt that turns into serious, cutthroat competition that brings out the best - and the worst - in the gang. S7, Ep3

The Raiders Minimization. Amy ruins one of Sheldon's favourite films. Leonard discovers how to get Penny to do his bidding. Raj and Stuart get creative with dating profiles. S7, Ep4

The Workplace Proximity. Amy takes a job at Sheldon's university, putting their relationship to the test. Howard ends up sleeping on Raj's couch after a fight with Bernadette. S7, Ep5

The Raiders Minimization. Amy ruins one of Sheldon's favourite films. Leonard discovers how to get Penny to do his bidding. Raj and Stuart get creative with dating profiles. S7, Ep4

The Workplace Proximity. Amy takes a job at Sheldon's university, putting their relationship to the test. Howard ends up sleeping on Raj's couch after a fight with Bernadette. S7, Ep5

The Itchy Brain Simulation. Leonard fails to stop Sheldon from overreacting after a past slight comes to light, and Penny has a run-in with Raj's former girlfriend Lucy. S7, Ep8

The Thanksgiving Decoupling. Howard's mother has a say when he and Bernadette host Thanksgiving dinner for the gang. Penny and Leonard must deal with a mistake from her past. S7, Ep9

The Discovery Dissipation. Amy and Leonard try to help Sheldon when his accidental scientific discovery is disproved. Howard and Bernadette open their home to Raj for a week. S7, Ep10

The Thanksgiving Decoupling. Howard's mother has a say when he and Bernadette host Thanksgiving dinner for the gang. Penny and Leonard must deal with a mistake from her past. S7, Ep9

The Discovery Dissipation. Amy and Leonard try to help Sheldon when his accidental scientific discovery is disproved. Howard and Bernadette open their home to Raj for a week. S7, Ep10

The Scavenger Vortex. Raj puts together a scientific scavenger hunt that turns into serious, cutthroat competition that brings out the best - and the worst - in the gang. S7, Ep3

The Raiders Minimization. Amy ruins one of Sheldon's favourite films. Leonard discovers how to get Penny to do his bidding. Raj and Stuart get creative with dating profiles. S7, Ep4

The Workplace Proximity. Amy takes a job at Sheldon's university, putting their relationship to the test. Howard ends up sleeping on Raj's couch after a fight with Bernadette. S7, Ep5

The Raiders Minimization. Amy ruins one of Sheldon's favourite films. Leonard discovers how to get Penny to do his bidding. Raj and Stuart get creative with dating profiles. S7, Ep4

The Workplace Proximity. Amy takes a job at Sheldon's university, putting their relationship to the test. Howard ends up sleeping on Raj's couch after a fight with Bernadette. S7, Ep5

The Itchy Brain Simulation. Leonard fails to stop Sheldon from overreacting after a past slight comes to light, and Penny has a run-in with Raj's former girlfriend Lucy. S7, Ep8

The Thanksgiving Decoupling. Howard's mother has a say when he and Bernadette host Thanksgiving dinner for the gang. Penny and Leonard must deal with a mistake from her past. S7, Ep9

The Discovery Dissipation. Amy and Leonard try to help Sheldon when his accidental scientific discovery is disproved. Howard and Bernadette open their home to Raj for a week. S7, Ep10

The Thanksgiving Decoupling. Howard's mother has a say when he and Bernadette host Thanksgiving dinner for the gang. Penny and Leonard must deal with a mistake from her past. S7, Ep9

The Discovery Dissipation. Amy and Leonard try to help Sheldon when his accidental scientific discovery is disproved. Howard and Bernadette open their home to Raj for a week. S7, Ep10

The Cooper Extraction. With Sheldon in Texas, the gang decorates for Christmas, and they each contemplate if they would have had a wonderful life if they'd never met him. S7, Ep11

The Hesitation Ramification. Penny turns to Leonard after her guest appearance doesn't turn out well. Sheldon works on his sense of humour, and Raj practices talking to girls. S7, Ep12

The Cooper Extraction. With Sheldon in Texas, the gang decorates for Christmas, and they each contemplate if they would have had a wonderful life if they'd never met him. S7, Ep11

The Hesitation Ramification. Penny turns to Leonard after her guest appearance doesn't turn out well. Sheldon works on his sense of humour, and Raj practices talking to girls. S7, Ep12

The Locomotive Manipulation. Amy talks Sheldon into a romantic Valentine's Day getaway to Napa Valley. Leonard and Penny make an emergency visit to the vet with Raj's dog. S7, Ep15

The Table Polarization. Leonard's purchase of a new dining room table doesn't sit well with Sheldon, and Bernadette isn't happy about Howard taking another trip to space. S7, Ep16

The Locomotive Manipulation. Amy talks Sheldon into a romantic Valentine's Day getaway to Napa Valley. Leonard and Penny make an emergency visit to the vet with Raj's dog. S7, Ep15

The Table Polarization. Leonard's purchase of a new dining room table doesn't sit well with Sheldon, and Bernadette isn't happy about Howard taking another trip to space. S7, Ep16

The Friendship Turbulence. Things turn rocky between Sheldon and Wolowitz, and Bernadette steps in to mediate. Penny is offered a movie role that may prove embarrassing. S7, Ep17

The Mommy Observation. Sheldon's visit to see his mummy forces him to start addressing a new reality. The gang speculate about where they might be in 20 years. S7, Ep18