The Big Bang Theory

After spending the night with Raj, Penny is worried that her friendship with the guys is in jeopardy, while Sheldon becomes the paintball team leader.

Sheldon is aghast to learn the new chair in Penny's apartment was found as garbage. Leonard and Priya try a long-distance relationship.

Leonard escorts Amy to a wedding. Meanwhile, Howard convinces Bernadette to spend the weekend with him at his mother's house as a trial run, and Sheldon gets involved in model trains.

Penny finds the perfect girl for Raj. Meanwhile, Sheldon uses D&D dice to make life's trivial decisions.

Sheldon is angry that Leonard plans to attend a party hosted by his nemesis, Wil Wheaton. Meanwhile, Howard is offered a chance to be a payload specialist on the International Space Station.

When his mother comes for another visit, Sheldon is disappointed that she's stopped being the mother he wants her to be.

Leonard finds himself drawn towards a comely comic book illustrator. Meanwhile, Sheldon tries to scare the gang for Halloween.

When it is revealed that Penny and Bernadette went wedding dress shopping without her, Amy becomes heartbroken and pressures Sheldon for physical contact.

Sheldon tries to cure his phobia of birds, while Leonard and Penny go to a movie as friends.

Sheldon becomes jealous when Amy goes on a date with Stuart.

Leonard has to face his high school bully, while Penny thinks she may have been one herself.