Episode Title:Silicon Valley Girls.Episode Description:The girls go on a mission to discover why machines are attacking three seemingly random people. The attacks turn out to be related, leading to Sam, Clover and Alex going undercover as exchange students at the high-tech Silicon Valley High school. There, they find out that the attacks are the work of a sentient and autonomous artificial intelligence/multi-agent system named C.H.A.D., the invention of a boy named Adam Lewis, who was bullied at all of his different schools. Though Adam only wanted to use C.H.A.D for harmless pranks, C.H.A.D instead harmed Adam's old enemies and now plans to fire nuclear missiles at all of Adam's old schools. Can the spies save Adam (now overshadowed by C.H.A.D) and stop this automated monster? In the subplot, Mandy becomes the student court judge and puts the girls on trash duty for minor dress-code infringements.