When the gang recreates prom night on the roof of their building, Sheldon feels pressure to participate in all the romantic traditions.
Sheldon worries his comfortable lifestyle is preventing him from achieving scientific progress so he asks his friends to make him miserable.
When the gang hears about an experiment designed to make participants fall in love, Sheldon and Penny put it to the test.
Penny tries to figure out why Emily doesn’t like her; the guys consider becoming part-owners in Stuart's comic book store.
Howard reluctantly agrees to volunteer at the soup kitchen; Sheldon and Amy spend Thanksgiving together as friends.