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Leonard, Sheldon and Raj fight for tenure at the University, and the competition heats up when the girls get involved, on THE BIG BANG THEORY, Thursday, April 4 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network. pictured left to right: Jim Parsons, Johnny Galecki, Simon Helberg and Kunal Nayyar Photo: Michael Yarish/Warner Bros. ©2013 Warner Bros. Television. All Rights Reserved.