A HORRIBLE DAY AT WORK PROMPTS PENNY TO TAKE A BIG STEP WITH LEONARD, ON "THE BIG BANG THEORY," THURSDAY, MAY 8

"The Gorilla Dissolution" - A bad day causes Penny to reevaluate her life choices - including Leonard. Meanwhile, Howard and Bernadette struggle to care for Mrs. Wolowitz, and Raj gets relationship advice from Sheldon, on THE BIG BANG THEORY, Thursday, May 8 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

CAST:

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

RECURRING CAST:

Wil Wheaton (Wil Wheaton)
Carol Ann Susi (Mrs. Wolowitz)

GUEST CAST:

Emily (Laura Spencer)
Kenneth (Steve Valentine)
Travis (Beau Casper Smart)
Marta (Kalika Kauahi)

STORY BY: Chuck Lorre, Jim Reynolds and Jeremy Howe

TELEPLAY BY: Steven Molaro, Steve Holland and Eric Kaplan

DIRECTED BY: Peter Chakos

RATING: To Be Announced