The Big Bang Theory - 9x4 - The 2003 Approximation 2015-10-12 Comedy / Romance Jim Parsons - Sheldon Cooper , Johnny Galecki - Leonard Hofstadter , Kaley Cuoco - Penny Leonard and Penny finally move in together leaving Sheldon very upset with this big change in his life and wishing he could go back to a time when he had no emotions in 2003 before he met Leonard. Raj, Howard and Stuart attempt to form a band. 25 TV-14