The Big Bang Theory: Season 9 Episode 4: The 2003 Approximation
Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Melissa Rauch, Mayim Bialik, Craig Welzbacher, Laura Spencer
Length: 19 minutes
On Air Date: 12 Oct 2015
The Big Bang Theory: S09E04 Description: An impending change to his living arrangements inspires Sheldon to revert to 2003, before he met Penny and Leonard. Raj and Howard form a band for the comic book store.