The Big Bang Theory: Season 7 Episode 18: The Contractual Obligation Implementation
Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Melissa Rauch, Christine Baranski
Length: 21 minutes
On Air Date: 7 Mar 2013
The Big Bang Theory: S06E18 Description: Leonard, Sheldon and Howard give lectures on science to junior high students. The girls ditch work to go to Disneyland. Raj devises a date for Lucy that fixes their social anxiety problems.