The Friendship Contraction

The Friendship Contraction is the fifteenth episode of the fifth season of the CBS sitcom The Big Bang Theory. It is set to air on February 2nd, 2012.

Summary
Tired of The Roommate Agreement, Leonard activates Clause 201 that reduces his relationship with Sheldon to mere acquaintances. Meanwhile, Howard choses his astronaut name for when he joins NASA's upcoming spring mission.

Title Reference
Leonard and Sheldon, after a slight dispute over the safety drills and other rules Sheldon has in place, signs off on their friendship, using Clause 201 in The Roommate Agreement to do so.

Trivia

 * Stuart appears in this episode, his last appearance was during the episode The Flaming Spittoon Acquisition.
 * Mike Massimino, a NASA astronaut makes a cameo appearance. Coincidentally, he is the first real-life astronaut to make a cameo on the show.

Quotes
Raj: Look at me, I am Brown Thunder.

Sheldon: And that's why we wear safety helmets.

Sheldon: You don't have a friend in me.

Penny: ''That's not what girlfriends are for... But you don't use them for what they are for, either.''

Source

 * Taping report from fanforum.com, generously provided by the user ennaxor.