WHEN AN ONLINE BULLY DESTROYS LEONARD AND SHELDON'S PHYSICS PAPER, THE GUYS BAND TOGETHER TO TAKE HIM DOWN, ON "THE BIG BANG THEORY," THURSDAY, FEB. 5

"The Troll Manifestation" - After Leonard and Sheldon co-publish a physics paper, they must defend themselves against criticism from an online bully. Also, girls' night finds Penny, Amy and Bernadette confronting embarrassing moments from their past, on THE BIG BANG THEORY, Thursday, Feb. 5 (8:00-8:31, ET/PT), on the CBS Television Network.

REGULAR CAST:

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

GUEST CAST:

Jim Meskimen (Doctor, V.O, Man, V.O)

WRITTEN BY: Steven Molaro, Eric Kaplan and Tara Hernandez

TELEPLAY BY: Jim Reynolds, Steve Holland and Maria Ferrari

DIRECTED BY: Mark Cendrowski