Duration: 22m

TV-PG 8.3 Comedy / Romance

The Big Bang Theory S1E16

When Penny learns that Leonard has never had a birthday party, she and the rest of the guys plan a surprise party for him.

Release Date: May 12, 2008 (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