Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable Bitcoin investment. Also, a seven-year-old video reveals a secret about Leonard and Penny's relationship.
Did You Know?
Although it only appears in flashbacks, this is the final appearance of The Cheesecake Factory in the series. See more
When Penny takes a picture of Amy and her date, the location of the camera switches. See more
Amy Farrah Fowler
Sheldon, what did you do?
I planned my revenge. If you get a dish, I'll serve you some cold.
Written by Lukasz Gottwald
, Benny Blanco
Performed by Kunal Nayyar
[Raj starts to sing the song when he mentions having it his head seven years ago] See more