Big Bang Theory Episode 200: Behind-the-Scenes Photos Feature Adam West, Sara Gilbert, Christine Baranski

CBS’ The Big Bang Theory shot its 200th episode on Tuesday with the help of a few friends.

Previously announced guest stars Adam West, Christine Baranski, John Ross Bowie, Wil Wheaton and Sara Gilbert were all on hand to shoot “The Celebration Experimentation,” and to appear in a few candid photos snapped by the cast.

Johnny Galecki, Jim Parsons, Kaley Cuoco, Kunal Nayyar, Melissa Rauch, Mayim Bialik, Bowie and Wheaton all took to Instagram to capture their time taping 200, sneaking in a few photos with the Batman icon and posing for an epic (albeit blurry) group shot. (Update: Promotional pictures have also been released by CBS.)

Browse the gallery below — or click here for direct access — then drop a line in the comments telling us who you’re most excited to see in Episode 200 (airing Thursday, Feb. 25 at 8/7c on CBS).