the-big-bang-theory-season-12-episode-6-21

"The Imitation Perturbation" - Pictured: Rajesh Koothrappali (Kunal Nayyar) and Leonard Hofstadter (Johnny Galecki). When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocked that Penny doesn't remember their first kiss, on THE BIG BANG THEORY, Thursday, Oct. 25 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved.