. "Tired of the Roommate Agreement, Leonard activates Clause 209, which reduces his relationship with Sheldon to mere acquaintances. Meanwhile, Howard tries to get his astronaut nickname for when he joins NASA's upcoming spring ISS mission."@en . . . . . . . . . . . . . . . . . "The Friendship Contraction"@en . . . . . . . . . . . . . "15"^^ . . . . . . . . . . . . . . "Season 6"@en . . . . . . . . "The Friendship Contraction"@en . . . . . . . . . . . . . . . . . . . . . "Disaster drill!"@en . . . . . . "2012-02-02"^^ . "Tired of the Roommate Agreement, Leonard activates Clause 209, which reduces his relationship with Sheldon to mere acquaintances. Meanwhile, Howard tries to get his astronaut nickname for when he joins NASA's upcoming spring ISS mission."@en . . . . . . . . . . . . . . . . . . . . . . "Season 4"@en . . . . . . . . "5"^^ . . . . . . . . . . . . . . . .