Plot summary
After taking a security job at an art museum, Scorpion is accused of destroying a priceless piece of art which they determine is a forgery. They must pass a mandated psychological evaluation or be banned from all Homeland assignments. Gallo has a connection, Hetty Lange ( Linda Hunt ), who is the operations manager of NCIS in Los Angeles and who helps them track down the real painting. Paige tasks Walter with an experiment to gain emotional quotient so his team can get more work, and also asks them for help when Ralph does not have anyone to go with him to his school's Halloween party.
Credits
Adapted from Wikipedia contributors, List of Scorpion episodes. HTML formatting and reference markers removed.