[s8e8] The Prom Equivalency -

In (Season 8, Episode 8) of The Big Bang Theory , the gang organizes a "prom do-over" on the roof of Leonard and Sheldon's apartment building. While most of the group seeks to replace disastrous high school memories, the episode serves as a major milestone for Sheldon and Amy's relationship. Plot Summary

The idea for a second prom arises after Bernadette and Amy share their miserable high school experiences—Amy was on the clean-up crew and danced with a mop, while Bernadette’s date only asked her to get closer to her friend. Penny, who was popular and attended seven proms, is the only one who didn't miss out, but she eventually agrees to participate. [S8E8] The Prom Equivalency