Veronica uncovers information that her fellow outcast Mac was switched at birth with a more affluent student, causing Veronica to examine her own questions about whom her real father may…

Sheldon beta-tests an MIT invention after hearing it can help him read people’s emotions. Also, Leonard can’t hide his feelings when Penny announces her brother is coming to town, and…

Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to.

It’s time for the midterm dance and Annie sets about getting the Greendale cafeteria ready for the festivities. She and Professor Hickey team to navigate Greendale’s custodial corridors of power…