In the all-new episode entitled "The Bitcoin Entanglement"—which airs on Thursday, Nov. 30 at 8/7c on CBS and CBS All Access—Sheldon ( Jim Parsons) attempts to teach the guys a lesson after they edged him out of a Bitcoin investment seven years earlier.
WATCH: Preview "The Bitcoin Entanglement," An All-New Episode Of The Big Bang Theory
During their trip down E-Memory Lane, Penny ( Kaley Cuoco) and Leonard ( Johnny Galecki) uncover an old video that reveals a secret about the couple's past.
Also, actor Brian Thomas Smith returns as Penny's ex Zack!
Will the guys be able to find their missing pay dirt?
STREAM: Full Episodes Of The Big Bang Theory On CBS All Access
Watch all-new episodes of The Big Bang Theory on Thursdays at 8/7c on CBS and CBS All Access.