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The Big Bang Theory S9E21 poster

Watch The Big Bang Theory – Season 9 Episode 21: The Viewing Party Combustion

The Big Bang Theory • Season 9, Episode 21 • 18 min • 2007 • ⭐ 7.9/10 • Comedy

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

Directors: Chuck Lorre , Bill Prady

Watch The Big Bang Theory – S9E21

Episode Overview

Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.

Episode Navigation

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