THE GANG MUST TAKE SIDES WHEN A FIGHT BETWEEN LEONARD AND SHELDON ESCALATES, ON "THE BIG BANG THEORY," THURSDAY, APRIL 21

"The Viewing Party Combustion" - Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together, on THE BIG BANG THEORY, Thursday, April 21 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

REGULAR CAST

Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST:

Kevin Sussman (Stuart)

WRITTEN BY: Eric Kaplan, Maria Ferrari and Jeremy Howe

TELEPLAY BY: Steven Molaro, Steve Holland and Tara Hernandez

DIRECTED BY: Mark Cendrowski