A new episode of The Big Bang Theory airs tonight at 8PM (ET) on CBS.

SHELDON FACES A CRISIS AFTER LEONARD DISPROVES HIS ACCIDENTAL SCIENTIFIC DISCOVERY, ON “THE BIG BANG THEORY,” THURSDAY, DEC. 5
Ira Flatow Guest Stars as Himself
“The Discovery Dissipation” – Leonard and Amy help Sheldon cope with the shame he’s feeling after his accidental contribution to science is disproved. Meanwhile, Raj must stay with Howard and Bernadette for a week, on THE BIG BANG THEORY, Thursday, Dec. 5 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network.
CAST: Johnny Galecki (Leonard), Jim Parsons (Sheldon), Kaley Cuoco (Penny), Simon Helberg (Wolowitz), Kunal Nayyar (Koothrappali), Mayim Bialik (Amy), Melissa Rauch (Bernadette)
RECURRING CAST: Wil Wheaton (Himself), John Ross Bowie (Barry Kripke)
GUEST CAST: Ira Flatow (Himself)
STORY BY: Eric Kaplan & Jim Reynolds & Maria Ferrari
TELEPLAY BY: Steven Molaro & Steve Holland & Adam Faberman
DIRECTED BY: Mark Cendrowski