THE BIG BANG THEORY Series Finale: ‘The Change Constant/The Stockholm Syndrome’ Photos

"The Stockholm Syndrome" - Pictured: Leonard Hofstadter (Johnny Galecki) and Penny (Kaley Cuoco). Bernadette and Wolowitz leave their kids for the first time, Penny and Leonard try to keep a secret, Sheldon and Amy stick together, and Koothrappali makes a new friend as the gang travels together into an uncharted future, on the series finale of THE BIG BANG THEORY, Thursday, May 16 (8:30 - 9:00PM, ET/PT) on the CBS Television Network. Photo: Michael Yarish/CBS ©2019 CBS Broadcasting, Inc. All Rights Reserved