The process by which things become separated or uncorrelated from each other.
Season 2, Episode 17 - The Terminator Decoupling
Aired March 9, 2009
When the guys take a trip to San Francisco for a physics convention, they are stunned to discover Summer Glau is a passenger on the train. Leonard, Howard and Raj each take turns trying to impress the Terminator: The Sarah Connor Chonricles star. Meanwhile, after Sheldon realizes he left an important flash drive at home, his disappointment soon turns to annoyance when he must contact Penny to retrieve a document on the flash drive.
Season 6, Episode 2 - The Decoupling Fluctuation
Aired October 4, 2012
When Penny has doubts about her relationship with Leonard, Sheldon comes to his buddy's defense and tries to convince Penny to stay with Leonard. Meanwhile, at the International Space Station, the other astronauts are picking on Howard, and Stuart joins the social group in his absence.
Season 7, Episode 9 - The Thanksgiving Decoupling
Aired November 21, 2013
Sheldon objects when he is forced to spend Thanksgiving at Mrs. Wolowitz's house with the group. A mistake from Penny's past adds drama to the gang's festivities, while Sheldon enjoys some unexpected male bonding.