Sheldon wants acting lessons from Penny, hoping they will make him a better teacher. ..More

After meeting at a fundraising gala, an aged but wealthy, Caltech donor makes Leonard ponder if he's willing to have sex with her to secure another donation. ..More

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

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

Sheldon and Amy decide to start rumors about themselves as a social test. Meanwhile, Howard takes his relationship with Bernadette to an even higher level. ..More

Raj makes an attempt to cure his phobia of talking to women; and Penny spies on Leonard and Priya with the help of Bernadette. ..More

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. ..More

On the fifth season premiere, Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team. ..More

A battle of wills between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya (AARTI MANN). ..More

Attending a co-worker's wedding, Leonard and Amy (MAYIM BIALIK) get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz! ..More

When Raj is upset he's the only one of the four guys who's not in a relationship, Penny sets out to find the perfect date, introducing him to Emily, a girl he can actually talk to! ..More