Sun Apr 19 7:30pm
The Big Bang TheoryThe Desperation Emanation(Season 4, Episode 5) TBS

Sheldon meets Amy's mother and comes to the realization that he no longer wants to see Amy; and Leonard realizes that everyone is in a relationship except for him.

Tue Apr 21 9:00pm
The Big Bang TheoryThe Cohabitation Formulation(Season 4, Episode 16) TBS

Howard contemplates a serious decision in his relationship with Bernadette; and Leonard and Raj's sister start seeing each other again.

Wed Apr 22 8:30pm
The Big Bang TheoryThe Zarnecki Incursion(Season 4, Episode 19) TBS

The guys become sleuths to find out who hacked Sheldon's online-game account.

Wed Apr 22 10:30pm
The Big Bang TheoryThe Engagement Reaction(Season 4, Episode 23) TBS

Howard finally tells his mother that he's marrying Bernadette, and the news puts her in the hospital.

Thu Apr 23 10:00pm
The Big Bang TheoryThe Roommate Transmogrification(Season 4, Episode 24) TBS

In the series four finale, Raj moves in with Sheldon when Leonard and Priya's "Star Trek" bedroom fantasy is too much for him; and the guys tease Howard when Bernadette gets her PhD, making Howard the only one without a doctorate.

Fri Apr 24 8:30pm
The Big Bang TheoryThe Pulled Groin Extrapolation(Season 5, Episode 3) TBS

Leonard is Amy's date for a wedding, giving Leonard a chance to get to know her better; and Howard and Bernadette spend a weekend with Mrs. Wolowitz.

Sat Apr 25 8:30pm
The Big Bang TheoryThe Russian Rocket Reaction(Season 5, Episode 5) TBS

Leonard and Sheldon attend a party at the home of Sheldon's nemesis, Wil Wheaton (in a cameo along with Brent Spiner).

Sun Apr 26 8:00pm
The Big Bang TheoryThe Shiny Trinket Maneuver(Season 5, Episode 12) TBS

Sheldon hurts Amy's feelings, and Penny gives him advice on how to be a better boyfriend; and Howard comes to terms with the fact that Bernadette isn't fond of children.

Mon Apr 27 10:00pm
The Big Bang TheoryThe Werewolf Transformation(Season 5, Episode 18) TBS

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.

Mon Apr 27 10:30pm
The Big Bang TheoryThe Weekend Vortex(Season 5, Episode 19) TBS

Sheldon opts to spend a weekend playing video games with the guys instead of attending a birthday party for Amy's aunt.

Tue Apr 28 8:30pm
The Big Bang TheoryThe Hawking Excitation(Season 5, Episode 21) TBS

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 Howard.

Tue Apr 28 10:30pm
The Big Bang TheoryThe Countdown Reflection(Season 5, Episode 24) TBS

The fifth series ends with Howard and Bernadette deciding to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding. NASA astronaut Mike Massimino has a cameo as himself.

Wed Apr 29 8:30pm
The Big Bang TheoryThe Date Night Variable(Season 6, Episode 1) TBS

Series 6 blasts off with Wolowitz in space, and despite that, he still has to intervene in an earthbound argument between his mother and Bernadette. Meanwhile, all Raj's friends are on dates, leaving him to ponder a solution to his loneliness.

Thu Apr 30 10:30pm
The Big Bang TheoryThe Habitation Configuration(Season 6, Episode 7) TBS

The new Mrs. Wolowitz wants her husband to move out of old Mrs. Wolowitz's house, while Amy and Wil Wheaton (as himself) get into a dispute, and Sheldon gets caught smack dab in the middle.