Katherine and the team head to Silicon Valley to invest in green tech, including Sandbox, a potentially bogus company founded by Wesley’s friend, Chase.

When a mechanic is found murdered in a dark factory, the CSI team investigates whether the perpetrator was human or a humanoid robot with an AI operating system.

Caroline is excited to go out on her first date with Bobby, but she has nervous jitters when she realizes Max will be alone and in charge of the dessert…

Sheldon and Raj confide in Bernadette when they can’t handle Amy and Howard working together on a science project. Also, Penny and Leonard learn new tactics for how to deal…