Démonstration

German Chancellor Angela Merkel gestures during a session at the lower house of parliament Bundestag in Berlin, Germany June 6, 2018. REUTERS/Axel Schmidt
« The Locomotion Reverberation »– Pictured: Sheldon Cooper (Jim Parsons). Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system. Also, Penny and Amy take Bernadette out for the night, leaving Raj and Stuart to care for baby Halley, on THE BIG BANG THEORY, Thursday, Feb. 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Dean Norris returns as Colonel Williams. Photo: Sonja Flemming/CBS ©2017 CBS Broadcasting, Inc. All Rights Reserved.