Amy Throws a Victorian Christmas Party in "The Clean Room Infiltration"

10/13

Using a fire extinguisher

Leonard (Johnny Galecki, left) and Wolowitz (Simon Helberg, right) nearly come to blows and turn to Raj for help in dealing with a work emergency, on THE BIG BANG THEORY, Thursday, Dec. 11 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Michael Ansell/Warner Bros. Entertainment Inc. © 2014 WBEI. All rights reserved.