Season 10, Episode 14 - The Emotion Detection Automation
Aired February 2, 2017
When Sheldon unintentionally offends Raj, he is keen to get hold of a new MIT invention that detects human emotions so he won't be in the dark about people's feelings. Meanwhile, Leonard and Penny argue when she wants to invite her brother to stay with them temporarily.
When his latest relationship comes to an end, Raj convenes a meeting of his ex-girlfriends to try understand why they broke up with him.