Sheldon Sends The Guys On A Wild Bitcoin Chase On The Big Bang Theory

Plus, a seven-year-old video sheds light on Penny and Leonard's relationship in "The Bitcoin Entanglement."

A potentially valuable (digital) fortune hangs in the balance in the latest installment of The Big Bang Theory!

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.