SHELDON AND THE GANG CELEBRATE HIS BIRTHDAY, ON THE 200TH EPISODE OF "THE BIG BANG THEORY," THURSDAY, FEB. 25

Christine Baranski, John Ross Bowie, Sara Gilbert and Wil Wheaton Return, Joined By Special Guest Star Adam West

"The Celebration Experimentation" - After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest, on the 200th episode of THE BIG BANG THEORY, Thursday, Feb. 25 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Christine Baranski, John Ross Bowie, Sara Gilbert and Wil Wheaton return, joined by special guest star Adam West.

REGULAR CAST

Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Mayim Bialik (Amy)
Melissa Rauch (Bernadette)

RECURRING CAST

Kevin Sussman (Stuart)
Christine Baranski (Beverly)
John Ross Bowie (Kripke)
Sara Gilbert (Leslie Winkle)
Wil Wheaton (Himself)

GUEST CAST:

Adam West (Himself)

WRITTEN BY: Chuck Lorre, Eric Kaplan, Jeremy Howe

TELEPLAY BY: Steven Molaro, Steve Holland, Tara Hernandez

DIRECTED BY: Mark Cendrowski