“The Locomotion Interruption” — Leonard (Johnny Galecki, center) and Amy (Mayim Bialik, left) take an unexpected road trip to Arizona to pick up Sheldon (Jim Parsons, right), on THE BIG BANG THEORY, Monday, Sept. 22, 2014 (8:00-8:30, ET/PT), on the CBS Television Network. Photo: Michael Yarish/WBEI é 2014 WBEI. All rights reserved.