E4 • The Cohabitation Experimentation

E1 • The Conjugal Conjecture

After Sheldon's mother and Leonard's father share an evening together, everyone deals with an awkward "morning after the night before" in the tenth season premiere.

21m • 2016

After Sheldon's mother and Leonard's father share an evening together, everyone deals with an awkward "morning after the night before" in the tenth season premiere.

E2 • The Military Miniaturization

Colonel Williams, an Air Force representative from the Department of Material Command, sits down for a talk with Howard.

18m • 2016

Colonel Williams, an Air Force representative from the Department of Material Command, sits down for a talk with Howard.

E3 • The Dependence Transcendence

Tensions rise when the guys struggle to complete their government project on time - and Sheldon tries an energy drink to stay awake. Meanwhile, Penny and Amy go to a geologist's "party".

19m • 2016

Tensions rise when the guys struggle to complete their government project on time - and Sheldon tries an energy drink to stay awake. Meanwhile, Penny and Amy go to a geologist's "party".

E4 • The Cohabitation Experimentation

When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Meanwhile, Raj learns the gender of Howard and Bernadette's baby….before they do.

19m • 2016

When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Meanwhile, Raj learns the gender of Howard and Bernadette's baby….before they do.

E5 • The Hot Tub Contamination

Sheldon threatens to break off their relationship when Amy refuses to adhere to his "bathroom schedule", putting their cohabitation experiment in jeopardy.

19m • 2016

Sheldon threatens to break off their relationship when Amy refuses to adhere to his "bathroom schedule", putting their cohabitation experiment in jeopardy.

E6 • The Fetal Kick Catalyst

Penny learns there are fans of her performance in "Serial Ape-ist" when she and Leonard attend a Comic Con event; Amy hosts a brunch at Penny's apartment; and Wolowitz makes an impulsive purchase.

18m • 2016

Penny learns there are fans of her performance in "Serial Ape-ist" when she and Leonard attend a Comic Con event; Amy hosts a brunch at Penny's apartment; and Wolowitz makes an impulsive purchase.

E7 • The Veracity Elasticity

Amy lies about repairs being made to her apartment so she can continue living with Sheldon; Leonard lets Penny decorate Sheldon's old room.

20m • 2016

Amy lies about repairs being made to her apartment so she can continue living with Sheldon; Leonard lets Penny decorate Sheldon's old room.

E8 • The Brain Bowl Incubation

After a successful experiment combining their genes, Sheldon is determined to procreate with Amy. Meanwhile, Raj is embarrassed with his new date's occupation.

18m • 2016

After a successful experiment combining their genes, Sheldon is determined to procreate with Amy. Meanwhile, Raj is embarrassed with his new date's occupation.

E9 • The Geology Elevation

Sheldon struggles to contain his jealousy when CalTech geologist Bert wins the MacArthur Genius Fellowship. Stephen Hawking returns for a guest appearance.

18m • 2016

Sheldon struggles to contain his jealousy when CalTech geologist Bert wins the MacArthur Genius Fellowship. Stephen Hawking returns for a guest appearance.

E10 • The Property Division Collision

A battle ensues when Leonard and Sheldon argue over who will get custody of their shared belongings. Christopher Lloyd guest stars.

19m • 2016

A battle ensues when Leonard and Sheldon argue over who will get custody of their shared belongings. Christopher Lloyd guest stars.

E11 • The Birthday Synchronicity

While Sheldon and Amy celebrate Amy's birthday, Howard and Bernadette welcome their new Baby Wolowitz.

19m • 2016

While Sheldon and Amy celebrate Amy's birthday, Howard and Bernadette welcome their new Baby Wolowitz.

E12 • The Holiday Summation

Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas. Laurie Metcalf returns as Sheldon's mother.

20m • 2016

Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas. Laurie Metcalf returns as Sheldon's mother.

E13 • The Romance Recalibration

When Leonard and Penny fight, Sheldon plays the unlikely peacemaker. Meanwhile, Howard and Raj try to fix a squeaky floorboard in the baby's room

18m • 2016

When Leonard and Penny fight, Sheldon plays the unlikely peacemaker. Meanwhile, Howard and Raj try to fix a squeaky floorboard in the baby's room

E14 • The Emotion Detection Automation

While Raj gets dating advice from his ex-girlfriends, Sheldon gets help reading people's feelings when he beta tests an emotion-detection invention.

19m • 2016

While Raj gets dating advice from his ex-girlfriends, Sheldon gets help reading people's feelings when he beta tests an emotion-detection invention.

E15 • The Locomotion Reverberation

Leonard and Howard try to distract Sheldon by giving him tickets to a historic railway, while Penny and Amy take Bernadette out for the night, leaving Raj and Stuart with the baby.

19m • 2016

Leonard and Howard try to distract Sheldon by giving him tickets to a historic railway, while Penny and Amy take Bernadette out for the night, leaving Raj and Stuart with the baby.

E16 • The Allowance Evaporation

Amy is furious when she learns Sheldon has shared intimate details of their relationship with people at the university, prompting their first fight since moving in together.

17m • 2016

Amy is furious when she learns Sheldon has shared intimate details of their relationship with people at the university, prompting their first fight since moving in together.

E17 • The Comic-Con Conundrum

When Raj is cut off from his father's fortune, he appoints Sheldon in charge of his finances to help him get out of debt. Meanwhile, Penny considers joining Leonard at Comic-Con.

19m • 2016

When Raj is cut off from his father's fortune, he appoints Sheldon in charge of his finances to help him get out of debt. Meanwhile, Penny considers joining Leonard at Comic-Con.

E18 • The Escape Hatch Identification

When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room. Christine Baranski returns as Leonard's mother, Beverly.

19m • 2016

When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room. Christine Baranski returns as Leonard's mother, Beverly.

E19 • The Collaboration Fluctuation

Leonard, Penny and Raj adjust to their new living arrangement, while Sheldon takes an interest in Amy's work.

18m • 2016

Leonard, Penny and Raj adjust to their new living arrangement, while Sheldon takes an interest in Amy's work.

E20 • The Recollection Dissipation

Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Howard as well as Amy on the same day. Meanwhile, Bernadette nears the end of her maternity leave.

18m • 2016

Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Howard as well as Amy on the same day. Meanwhile, Bernadette nears the end of her maternity leave.

E21 • The Separation Agitation

Howard and Bernadette have a hard time leaving Halley in daycare when Bernadette returns to work. Meanwhile, Bert introduces the gang to his new girlfriend, Rebecca.

19m • 2016

Howard and Bernadette have a hard time leaving Halley in daycare when Bernadette returns to work. Meanwhile, Bert introduces the gang to his new girlfriend, Rebecca.

E22 • The Cognition Regeneration

Leonard isn't thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.

19m • 2016

Leonard isn't thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.

E23 • The Gyroscopic Collapse

After Leonard, Sheldon and Howard celebrate the completion of their top secret Air Force project, they're met with an unpleasant surprise.

18m • 2016

After Leonard, Sheldon and Howard celebrate the completion of their top secret Air Force project, they're met with an unpleasant surprise.

E24 • The Long Distance Dissonance

On the tenth season finale, the gang is concerned when Sheldon's former admirer, Dr. Ramona Nowitzki resurfaces while Amy is away at Princeton.

19m • 2016

On the tenth season finale, the gang is concerned when Sheldon's former admirer, Dr. Ramona Nowitzki resurfaces while Amy is away at Princeton.