Duration: 22m

TV-PG 8.6 Comedy / Romance

The Big Bang Theory S4E11

The guys enter a costume contest as members of the Justice League and convince Penny and Zack to join them.

Release Date: December 16, 2010 (USA)

Creator: Chuck Lorre, Bill Prady

Cast: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar, Melissa Rauch, Mayim Bialik, Kevin Sussman, Bob Newhart