The Happy Place (S09E02)

A young woman is hypnotised into robbing a bank and then jumping to her death from a 20 story balcony. The CSI's track the murder by finding a phone across the street that called the girl that night, and whomever was on that payphone watched her jump. Sara struggles with being back -- she can no longer tackle the darkness of the job. She wants to stay with Grissom, but she knows she has to leave. (CBS TV Network)