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'The Emotion Detection Automation' - Season 10, Episode 14
Sheldon tries to improve his understanding of people's emotions by beta testing a new MIT invention which can detect how people are feeling. Meanwhile, Leonard and Penny argue when she wants to invite her brother to stay with them, and Raj convenes a meeting of his ex-girlfriends to try understand why they broke up with him.
Air Date: February 2, 2017.