SHELDON AND AMY SPEND THANKSGIVING AT THE AQUARIUM TOGETHER AS FRIENDS, ON "THE BIG BANG THEORY," THURSDAY, NOV. 19

Business Magnate and Inventor Elon Musk Guest Stars as Himself

"The Platonic Permutation" - Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought, on THE BIG BANG THEORY, Thursday, Nov. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Business magnate and inventor Elon Musk appears as himself.

REGULAR CAST:

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

RECURRING CAST:

Laura Spencer (Bernadette)
(Emily)

GUEST CAST:

Elon Musk (Himself)
Wayne Wilderson (Travis)

WRITTEN BY: Jim Reynolds, Jeremy Howe and Tara Hernandez

TELEPLAY BY: Steve Holland, Maria Ferrari and Adam Faberman

DIRECTED BY: Mark Cendrowski