Craig Tsuyumine

The serial killer resurfaces after 20 years of silence and contacts the Behavioral Analysis Unit with the promise that he will kill another victim in the next five days. As the team springs into action, Gideon enlists the help of a former colleague who worked the case when it was fresh to help find the killer.

Izzie faces her past and finds comfort in George; Alex has an attachment to Jane Doe; Meredith and Derek question their status; Cristina resolves to fight for her relationship with Burke.

Jane and the CBI are called in when a retired star quarterback (guest star Craig Bierko) is presumed dead following a car explosion.

Team Scorpion goes undercover on a cruise ship to locate and disable deadly stolen rockets. Meanwhile, as Valentine's Day approaches, Toby and Happy help Ralph, who is in the throes of his first crush.

DEA Agent Talia Del Campo's partner is murdered; Kensi thinks Deeks is hiding something.

Charlie becomes the target of physical intimidation aimed at disrupting his work on the case of a missing investigative journalist.