ZzzzCAPÍTULOS DE THE BIG BANG THEORY QUE VALEN LA PENA

Penny plans revenge when Sheldon bans her from his and Leonard's apartment, while Howard and Raj use the latest technology to try to find the house being used in "America's Next Top Model."

Sheldon introduces Penny to online gaming, however she refuses to quit after becoming addicted.

Leonard is disappointed when Penny develops an interest in an attractive physicist at the university. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny.

Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leonard and Penny to the bottle.

Penny is forced to turn to Sheldon for help when she dislocates her shoulder in the bathtub. Meanwhile, the rest of the guys accidentally get stoned in the desert while waiting for a meteor shower.

Leonard tells Penny about how he and Sheldon became roommates and what happened to the elevator.

Penny ends up tagging along on Sheldon's first ever date with Amy, while Howard finds an unusual use for a robotic arm.

The guys enter a costume contest as members of the Justice League and convince Penny and Zack to join them.

The gang spend Thanksgiving at Mrs. Wolowitz's house. Howard tries to bond with his father-in-law, and a mistake from Penny's past comes back to haunt her.

When Amy's parents and Sheldon's family arrive, everybody is focused to make sure all wedding arrangements go according to plan - everyone except the bride and groom.

Sheldon and Amy await big news.

The gang get competitive when they are forced to take part in Raj's scavenger hunt.

Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.