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Season 1 - Sep. 24, 2007

Season 2 - Sep. 22, 2008

Season 3 - Sep. 21, 2009

Season 4 - Sep. 23, 2010

Season 5 - Sep. 22, 2011

Season 6 - Sep. 27, 2012

Season 7 - Sep. 26, 2013

Season 8 - Sep. 22, 2014

Season 9 - Sep. 21, 2015

Season 10 - Sep. 19, 2016

Season 11 - Sep. 25, 2017

Season 12 - Sep. 24, 2018

The Big Bang Theory Season 4 Episode 17

Sheldon becomes concerned when everybody begins to hang out at Raj’s apartment and discovers Leonard is the center of the group.

Released: 2011-02-24

Serie Name: The Big Bang Theory

Episode Name: The Toast Derivation

Quality: HD