The Big Bang Theory - Season 4 Episode 17 : The Toast Derivation

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The Big Bang Theory - Season 4 Episode 17 : The Toast Derivation
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Title:The Big Bang Theory - Season 4 Episode 17 : The Toast Derivation
Genre: Comedy
Air Date: 2011-02-24
Season Number: 4
Episodes Number: 17
Guest Stars: Kevin Sussman (Stuart Bloom), Brian Thomas Smith (Zack Johnson), Aarti Mann (Priya Koothrappali), LeVar Burton (Himself), John Ross Bowie (Barry Kripke)
Stars: Kaley Cuoco (Penny), Johnny Galecki (Leonard Hofstadter), Jim Parsons (Sheldon Cooper), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Rajesh Koothrappali), Mayim Bialik (Amy Farrah Fowler),
Overview
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
Seasons List
  • Season 1 (17 episode) - September 24, 2007
  • Season 2 (23 episode) - September 22, 2008
  • Season 3 (23 episode) - September 21, 2009
  • Season 4 (24 episode) - September 23, 2010
  • Season 5 (24 episode) - September 22, 2011
  • Season 6 (24 episode) - September 27, 2012
  • Season 7 (24 episode) - September 25, 2013
  • Season 8 (24 episode) - September 22, 2014
  • Season 9 (24 episode) - September 21, 2015
  • Season 10 (24 episode) - September 19, 2016
  • Season 11 (18 episode) - September 25, 2017