The Hawking Excitation: When Stephen Hawking comes to lecture at the university, Howard is given the task of maintaining his wheelchair, which makes Sheldon envious. (S5 Ep21) [AD,S]
The Stag Convergence: Leonard, Sheldon and Raj throw a bachelor party for Howard, during which some stories about his sexual history are accidentally revealed. (S5 Ep22) [AD,S]
The Hawking Excitation: When Stephen Hawking comes to lecture at the university, Howard is given the task of maintaining his wheelchair, which makes Sheldon envious. (S5 Ep21) [AD,S]
The Stag Convergence: Leonard, Sheldon and Raj throw a bachelor party for Howard, during which some stories about his sexual history are accidentally revealed. (S5 Ep22) [AD,S]
The Santa Simulation: Sheldon unwillingly reveals painful memories of Christmas past when Leonard persuades him to join in with a seasonal game of Dungeons & Dragons. (S6 Ep11) [AD,S]
The Egg Salad Equivalency: Sheldon is accused of sexual harassment and sent to Human Resources, where he ends up dragging Leonard, Raj and Howard into trouble too. (S6 Ep12) [AD,S]
The Santa Simulation: Sheldon unwillingly reveals painful memories of Christmas past when Leonard persuades him to join in with a seasonal game of Dungeons & Dragons. (S6 Ep11) [AD,S]
The Egg Salad Equivalency: Sheldon is accused of sexual harassment and sent to Human Resources, where he ends up dragging Leonard, Raj and Howard into trouble too. (S6 Ep12) [AD,S]
The Bakersfield Expedition: The guys get all dressed up for a photo opportunity at a Star Trek location but end up stranded in the desert. (S6 Ep13) [AD,S]
The Cooper/Kripke Inversion: Sheldon is forced to work on the same project as his nemesis, Barry Kripke. Howard and Raj spend a fortune on personalised action figures. (S6 Ep14) [AD,S]
The Thanksgiving Decoupling: Howard takes the gang to his mother's house for Thanksgiving to protect himself from his grumpy father-in-law who has also been invited. (S7 Ep9) [AD,S]
The Proton Displacement: Sheldon is jealous when Professor Proton asks Leonard to read his latest publication, so he befriends a TV personality from a rival science show. (S7 Ep7) [AD,S]
The Discovery Dissipation: Sheldon feels guilty when he gets attention for his accidental discovery of a new element. Raj stays with Howard and Bernadette for a week. (S7 Ep10) [AD,S]
The Itchy Brain Simulation: Leonard worries that Sheldon will overreact when he confesses that he failed to return a DVD to the rental shop seven years earlier. (S7 Ep8) [AD,S]
The Thanksgiving Decoupling: Howard takes the gang to his mother's house for Thanksgiving to protect himself from his grumpy father-in-law who has also been invited. (S7 Ep9) [AD,S]
The Discovery Dissipation: Sheldon feels guilty when he gets attention for his accidental discovery of a new element. Raj stays with Howard and Bernadette for a week. (S7 Ep10) [AD,S]
The Thanksgiving Decoupling: Howard takes the gang to his mother's house for Thanksgiving to protect himself from his grumpy father-in-law who has also been invited. (S7 Ep9) [AD,S]
The Discovery Dissipation: Sheldon feels guilty when he gets attention for his accidental discovery of a new element. Raj stays with Howard and Bernadette for a week. (S7 Ep10) [AD,S]
The Launch Acceleration: When NASA inform Howard that his space mission has been rescheduled to an earlier date, he tries to use the wedding as an excuse not to go. (S5 Ep23) [AD,S]
The Countdown Reflection: Bernadette decides that she wants to get married to Howard before his NASA space mission, but can they get organised in time? (S5 Ep24) [AD,S]
The Launch Acceleration: When NASA inform Howard that his space mission has been rescheduled to an earlier date, he tries to use the wedding as an excuse not to go. (S5 Ep23) [AD,S]
The Countdown Reflection: Bernadette decides that she wants to get married to Howard before his NASA space mission, but can they get organised in time? (S5 Ep24) [AD,S]
The Spoiler Alert Segmentation: After Sheldon and Leonard have a row, Leonard attempts to move in with Penny, even though she isn't ready for such a big step. (S6 Ep15) [AD,S]
The Tangible Affection Proof: Annoyed at being forced to celebrate Valentine's Day when he hates it, Sheldon delegates the task of buying Amy's gift to his assistant. (S6 Ep16) [AD,S]
The Monster Isolation: After a terrible date with Lucy, Raj vows never to leave his flat again. Sheldon asks Penny to help him record a new episode of Fun with Flags. (S6 Ep17) [AD,S]
The Spoiler Alert Segmentation: After Sheldon and Leonard have a row, Leonard attempts to move in with Penny, even though she isn't ready for such a big step. (S6 Ep15) [AD,S]
The Contractual Obligation Implementation: Leonard, Sheldon and Howard are forced to volunteer for a university committee. Raj plans a stress-free date with Lucy. (S6 Ep18) [AD,S]
The Tangible Affection Proof: Annoyed at being forced to celebrate Valentine's Day when he hates it, Sheldon delegates the task of buying Amy's gift to his assistant. (S6 Ep16) [AD,S]
The Monster Isolation: After a terrible date with Lucy, Raj vows never to leave his flat again. Sheldon asks Penny to help him record a new episode of Fun with Flags. (S6 Ep17) [AD,S]
The Contractual Obligation Implementation: Leonard, Sheldon and Howard are forced to volunteer for a university committee. Raj plans a stress-free date with Lucy. (S6 Ep18) [AD,S]
The Cooper Extraction: Sheldon has to go back to Texas when his sister goes into labour. While he's away, the gang gather at the flat to decorate the Christmas tree. (S7 Ep11) [AD,S]
The Hesitation Ramification: Penny's big TV acting break hits the cutting-room floor, so Leonard does his best to comfort her, which leads her to ask him a bold question. (S7 Ep12) [AD,S]
The Occupation Recalibration: Penny quits her job at the restaurant to pursue her acting career full-time. Bernadette accidentally destroys one of Howard's comics. (S7 Ep13) [AD,S]
The Cooper Extraction: Sheldon has to go back to Texas when his sister goes into labour. While he's away, the gang gather at the flat to decorate the Christmas tree. (S7 Ep11) [AD,S]
The Convention Conundrum: After the guys miss out on Comic-Con tickets, Sheldon decides to hold his own comic book convention. The girls take tea at a swanky hotel. (S7 Ep14) [AD,S]
The Hesitation Ramification: Penny's big TV acting break hits the cutting-room floor, so Leonard does his best to comfort her, which leads her to ask him a bold question. (S7 Ep12) [AD,S]
The Occupation Recalibration: Penny quits her job at the restaurant to pursue her acting career full-time. Bernadette accidentally destroys one of Howard's comics. (S7 Ep13) [AD,S]
The Convention Conundrum: After the guys miss out on Comic-Con tickets, Sheldon decides to hold his own comic book convention. The girls take tea at a swanky hotel. (S7 Ep14) [AD,S]
The Cooper Extraction: Sheldon has to go back to Texas when his sister goes into labour. While he's away, the gang gather at the flat to decorate the Christmas tree. (S7 Ep11) [AD,S]
The Hesitation Ramification: Penny's big TV acting break hits the cutting-room floor, so Leonard does his best to comfort her, which leads her to ask him a bold question. (S7 Ep12) [AD,S]
The Higgs Boson Observation: Amy is jealous when Sheldon hires an attractive female assistant, and Howard's return from space is delayed by a week. (S6 Ep3) [AD,S]
The Re-entry Minimization: Howard is disappointed when he doesn't receive a hero's welcome on his return from space. Will he ever get the recognition he deserves? (S6 Ep4) [AD,S]
The Holographic Excitation: The gang celebrate Halloween with a fancy dress party at Stuart's comic book shop, but Sheldon and Amy can't agree on which costumes to wear. (S6 Ep5) [AD,S]
The Higgs Boson Observation: Amy is jealous when Sheldon hires an attractive female assistant, and Howard's return from space is delayed by a week. (S6 Ep3) [AD,S]
The Re-entry Minimization: Howard is disappointed when he doesn't receive a hero's welcome on his return from space. Will he ever get the recognition he deserves? (S6 Ep4) [AD,S]
The Holographic Excitation: The gang celebrate Halloween with a fancy dress party at Stuart's comic book shop, but Sheldon and Amy can't agree on which costumes to wear. (S6 Ep5) [AD,S]
The Scavenger Vortex: Raj organises an epic and demanding scavenger hunt, designed to test the friends' scientific knowledge and common sense. (S7 Ep3) [AD,S]
The Raiders Minimization: Amy ruins one of Sheldon's favourite films by pointing out a flaw in the storyline. Raj and Stuart decide to create online dating profiles. (S7 Ep4) [AD,S]
The Workplace Proximity: Amy tells Sheldon she's been asked to work on a project at his university, but the guys insist that it will be bad for their relationship. (S7 Ep5) [AD,S]
The Romance Resonance: Sheldon is mortified when he stumbles upon an important scientific breakthrough by accident. Howard makes a romantic gesture to Bernadette. (S7 Ep6) [AD,S]
The Proton Displacement: Sheldon is jealous when Professor Proton asks Leonard to read his latest publication, so he befriends a TV personality from a rival science show. (S7 Ep7) [AD,S]
The Itchy Brain Simulation: Leonard worries that Sheldon will overreact when he confesses that he failed to return a DVD to the rental shop seven years earlier. (S7 Ep8) [AD,S]
The Thanksgiving Decoupling: Howard takes the gang to his mother's house for Thanksgiving to protect himself from his grumpy father-in-law who has also been invited. (S7 Ep9) [AD,S]
The Discovery Dissipation: Sheldon feels guilty when he gets attention for his accidental discovery of a new element. Raj stays with Howard and Bernadette for a week. (S7 Ep10) [AD,S]
The Cooper Extraction: Sheldon has to go back to Texas when his sister goes into labour. While he's away, the gang gather at the flat to decorate the Christmas tree. (S7 Ep11) [AD,S]
The Hesitation Ramification: Penny's big TV acting break hits the cutting-room floor, so Leonard does his best to comfort her, which leads her to ask him a bold question. (S7 Ep12) [AD,S]
The Extract Obliteration: Sheldon is thrilled when Stephen Hawking agrees to play against him in an online game. Penny signs up for a class at the community college. (S6 Ep6) [AD,S]
The Habitation Configuration: Amy is upset when Sheldon fails to defend her in an argument with Wil Wheaton during the filming of a new episode of Fun with Flags. (S6 Ep7) [AD,S]
The 43 Peculiarity: The guys notice that Sheldon disappears for 20 minutes after lunch every day. Filled with curiosity, they attempt to work out what he's been doing. (S6 Ep8) [AD,S]
The Extract Obliteration: Sheldon is thrilled when Stephen Hawking agrees to play against him in an online game. Penny signs up for a class at the community college. (S6 Ep6) [AD,S]
The Parking Spot Escalation: When non-driver Sheldon finds out that his unused parking space at the university has been reallocated to Howard, he feels undermined. (S6 Ep9) [AD,S]
The Habitation Configuration: Amy is upset when Sheldon fails to defend her in an argument with Wil Wheaton during the filming of a new episode of Fun with Flags. (S6 Ep7) [AD,S]
The Fish Guts Displacement: Sheldon begrudgingly takes care of Amy when she is sick. Bernadette arranges for Howard to go on a fishing trip with her macho father. (S6 Ep10) [AD,S]
The 43 Peculiarity: The guys notice that Sheldon disappears for 20 minutes after lunch every day. Filled with curiosity, they attempt to work out what he's been doing. (S6 Ep8) [AD,S]
The Parking Spot Escalation: When non-driver Sheldon finds out that his unused parking space at the university has been reallocated to Howard, he feels undermined. (S6 Ep9) [AD,S]
The Fish Guts Displacement: Sheldon begrudgingly takes care of Amy when she is sick. Bernadette arranges for Howard to go on a fishing trip with her macho father. (S6 Ep10) [AD,S]
The Date Night Variable: Howard gets caught in a row between his mum and Bernadette while he's at the International Space Station. Sheldon invites Raj along on a date with Amy. (S6 Ep1) [AD,S]
The Decoupling Fluctuation: Sheldon intervenes when he learns that Penny is thinking about breaking up with Leonard, but he's hampered by his inability to keep a secret. (S6 Ep2) [AD,S]
The Date Night Variable: Howard gets caught in a row between his mum and Bernadette while he's at the International Space Station. Sheldon invites Raj along on a date with Amy. (S6 Ep1) [AD,S]
The Decoupling Fluctuation: Sheldon intervenes when he learns that Penny is thinking about breaking up with Leonard, but he's hampered by his inability to keep a secret. (S6 Ep2) [AD,S]
The Closet Reconfiguration: When Howard and Bernadette get Sheldon to organise their untidy closet, Sheldon finds an unopened letter from Howard's long-absent father. (S6 Ep19) [AD,S]
The Closure Alternative: Amy employs a series of exercises to cure Sheldon of his compulsion to complete every task without fail and seek closure for every incident. (S6 Ep21) [AD,S]
The Closet Reconfiguration: When Howard and Bernadette get Sheldon to organise their untidy closet, Sheldon finds an unopened letter from Howard's long-absent father. (S6 Ep19) [AD,S]
The Proton Resurgence: Leonard and Sheldon hire Professor Proton, the host of a TV science show they watched as children, to come to their flat and entertain them. (S6 Ep22) [AD,S]
The Closure Alternative: Amy employs a series of exercises to cure Sheldon of his compulsion to complete every task without fail and seek closure for every incident. (S6 Ep21) [AD,S]
The Proton Resurgence: Leonard and Sheldon hire Professor Proton, the host of a TV science show they watched as children, to come to their flat and entertain them. (S6 Ep22) [AD,S]
The Occupation Recalibration: Penny quits her job at the restaurant to pursue her acting career full-time. Bernadette accidentally destroys one of Howard's comics. (S7 Ep13) [AD,S]
The Convention Conundrum: After the guys miss out on Comic-Con tickets, Sheldon decides to hold his own comic book convention. The girls take tea at a swanky hotel. (S7 Ep14) [AD,S]
The Scavenger Vortex: Raj organises an epic and demanding scavenger hunt, designed to test the friends' scientific knowledge and common sense. (S7 Ep3) [AD,S]
The Deception Verification: Leonard returns early from his research expedition as a surprise for Penny, but Sheldon becomes upset that he wasn't in on the secret. (S7 Ep2) [AD,S]
The Hofstadter Insufficiency: Sheldon and Penny bond while Leonard is away. Raj finds someone to share his heartache. Bernadette and Amy attract male attention at a conference. (S7 Ep1) [AD,S]
The Bon Voyage Reaction: Leonard is offered an exciting job opportunity that will keep him out of the country for several months. Raj pushes the boundaries of his relationship. (S6 Ep24) [AD,S]
The Love Spell Potential: When the girls' trip to Las Vegas falls through, the guys invite them to a Dungeons & Dragons night that changes Sheldon and Amy's relationship. (S6 Ep23) [AD,S]
The Proton Resurgence: Leonard and Sheldon hire Professor Proton, the host of a TV science show they watched as children, to come to their flat and entertain them. (S6 Ep22) [AD,S]
The Closure Alternative: Amy employs a series of exercises to cure Sheldon of his compulsion to complete every task without fail and seek closure for every incident. (S6 Ep21) [AD,S]
The Contractual Obligation Implementation: Leonard, Sheldon and Howard are forced to volunteer for a university committee. Raj plans a stress-free date with Lucy. (S6 Ep18) [AD,S]
The Monster Isolation: After a terrible date with Lucy, Raj vows never to leave his flat again. Sheldon asks Penny to help him record a new episode of Fun with Flags. (S6 Ep17) [AD,S]
The Deception Verification: Leonard returns early from his research expedition as a surprise for Penny, but Sheldon becomes upset that he wasn't in on the secret. (S7 Ep2) [AD,S]
The Hofstadter Insufficiency: Sheldon and Penny bond while Leonard is away. Raj finds someone to share his heartache. Bernadette and Amy attract male attention at a conference. (S7 Ep1) [AD,S]
The Bon Voyage Reaction: Leonard is offered an exciting job opportunity that will keep him out of the country for several months. Raj pushes the boundaries of his relationship. (S6 Ep24) [AD,S]
The Love Spell Potential: When the girls' trip to Las Vegas falls through, the guys invite them to a Dungeons & Dragons night that changes Sheldon and Amy's relationship. (S6 Ep23) [AD,S]
The Proton Resurgence: Leonard and Sheldon hire Professor Proton, the host of a TV science show they watched as children, to come to their flat and entertain them. (S6 Ep22) [AD,S]
The Closure Alternative: Amy employs a series of exercises to cure Sheldon of his compulsion to complete every task without fail and seek closure for every incident. (S6 Ep21) [AD,S]
The Cooper/Kripke Inversion: Sheldon is forced to work on the same project as his nemesis, Barry Kripke. Howard and Raj spend a fortune on personalised action figures. (S6 Ep14) [AD,S]
The Bakersfield Expedition: The guys get all dressed up for a photo opportunity at a Star Trek location but end up stranded in the desert. (S6 Ep13) [AD,S]
The Egg Salad Equivalency: Sheldon is accused of sexual harassment and sent to Human Resources, where he ends up dragging Leonard, Raj and Howard into trouble too. (S6 Ep12) [AD,S]
The Santa Simulation: Sheldon unwillingly reveals painful memories of Christmas past when Leonard persuades him to join in with a seasonal game of Dungeons & Dragons. (S6 Ep11) [AD,S]
The Fish Guts Displacement: Sheldon begrudgingly takes care of Amy when she is sick. Bernadette arranges for Howard to go on a fishing trip with her macho father. (S6 Ep10) [AD,S]
The Parking Spot Escalation: When non-driver Sheldon finds out that his unused parking space at the university has been reallocated to Howard, he feels undermined. (S6 Ep9) [AD,S]
The 43 Peculiarity: The guys notice that Sheldon disappears for 20 minutes after lunch every day. Filled with curiosity, they attempt to work out what he's been doing. (S6 Ep8) [AD,S]
The Habitation Configuration: Amy is upset when Sheldon fails to defend her in an argument with Wil Wheaton during the filming of a new episode of Fun with Flags. (S6 Ep7) [AD,S]
The Extract Obliteration: Sheldon is thrilled when Stephen Hawking agrees to play against him in an online game. Penny signs up for a class at the community college. (S6 Ep6) [AD,S]
The Holographic Excitation: The gang celebrate Halloween with a fancy dress party at Stuart's comic book shop, but Sheldon and Amy can't agree on which costumes to wear. (S6 Ep5) [AD,S]
The Re-entry Minimization: Howard is disappointed when he doesn't receive a hero's welcome on his return from space. Will he ever get the recognition he deserves? (S6 Ep4) [AD,S]
The Higgs Boson Observation: Amy is jealous when Sheldon hires an attractive female assistant, and Howard's return from space is delayed by a week. (S6 Ep3) [AD,S]
The Decoupling Fluctuation: Sheldon intervenes when he learns that Penny is thinking about breaking up with Leonard, but he's hampered by his inability to keep a secret. (S6 Ep2) [AD,S]
The Date Night Variable: Howard gets caught in a row between his mum and Bernadette while he's at the International Space Station. Sheldon invites Raj along on a date with Amy. (S6 Ep1) [AD,S]
The Stag Convergence: Leonard, Sheldon and Raj throw a bachelor party for Howard, during which some stories about his sexual history are accidentally revealed. (S5 Ep22) [AD,S]
The Hawking Excitation: When Stephen Hawking comes to lecture at the university, Howard is given the task of maintaining his wheelchair, which makes Sheldon envious. (S5 Ep21) [AD,S]
The Extract Obliteration: Sheldon is thrilled when Stephen Hawking agrees to play against him in an online game. Penny signs up for a class at the community college. (S6 Ep6) [AD,S]
The Holographic Excitation: The gang celebrate Halloween with a fancy dress party at Stuart's comic book shop, but Sheldon and Amy can't agree on which costumes to wear. (S6 Ep5) [AD,S]
The Re-entry Minimization: Howard is disappointed when he doesn't receive a hero's welcome on his return from space. Will he ever get the recognition he deserves? (S6 Ep4) [AD,S]
The Higgs Boson Observation: Amy is jealous when Sheldon hires an attractive female assistant, and Howard's return from space is delayed by a week. (S6 Ep3) [AD,S]
The Decoupling Fluctuation: Sheldon intervenes when he learns that Penny is thinking about breaking up with Leonard, but he's hampered by his inability to keep a secret. (S6 Ep2) [AD,S]
The Date Night Variable: Howard gets caught in a row between his mum and Bernadette while he's at the International Space Station. Sheldon invites Raj along on a date with Amy. (S6 Ep1) [AD,S]
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 is ill in hospital. (S5 Ep18) [AD,S]
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. (S5 Ep17) [AD,S]
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 that she gives him. (S5 Ep16) [AD,S]
The Friendship Contraction: After Sheldon keeps him awake all night, an irate Leonard decides he needs to break the roommate agreement, which formally ends their friendship. (S5 Ep15) [AD,S]
The Beta Test Initiation: Leonard and Penny put their relationship through a 'beta test' and report problems with each other as 'bugs'. Sheldon and Amy seek internet fame. (S5 Ep14) [AD,S]
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. (S5 Ep13) [AD,S]
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. (S5 Ep12) [AD,S]
The Speckerman Recurrence: Leonard confronts the man who bullied him in high school, while Penny realises that she did her fair share of tormenting in the past. (S5 Ep11) [AD,S]
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. (S5 Ep20) [AD,S]
The Weekend Vortex: Amy is upset when Sheldon breaks his promise to attend her aunt's birthday party in order to join the guys for a Star Wars video game marathon instead. (S5 Ep19) [AD,S]
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 is ill in hospital. (S5 Ep18) [AD,S]
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. (S5 Ep17) [AD,S]
The Beta Test Initiation: Leonard and Penny put their relationship through a 'beta test' and report problems with each other as 'bugs'. Sheldon and Amy seek internet fame. (S5 Ep14) [AD,S]