Plot summary
When the CIA 's Internal Affairs Division intercepts an encrypted message that was sent by someone in their L.A. office, Scorpion must uncover the mole who leaked classified information and snuck out chemicals for pesticides to an aid worker he loves in Yemen, thinking it was for a humanitarian cause. The team is confronted with stopping a seductive agent trying to produce nerve gas with the stolen chemicals. Meanwhile, Paige confronts her feelings for Walter and helps him prepare for the case by giving him a lesson in flirting.
Credits
Adapted from Wikipedia contributors, List of Scorpion episodes. HTML formatting and reference markers removed.