Aidan Andrews

Lexie watches Zola as Meredith and Derek try to have a night to themselves for Valentine's Day; Callie surprises Arizona with a romantic evening; Ben tries to prove that he knows Bailey better than she thinks.

A sniper begins a campaign of random shootings in the city, but only the police know that the killings are connected. Mac has to balance his desire to warn the public against his superiors' insistence that doing so would cause mass panic.

The team investigates the death of a janitor at a tennis academy. In the process, they uncover disturbing evidence that someone at the academy is a child molester.

Martin manages to enter Aster Corps and retrieve Calvin's files, while Lucy and Trevor discover unnerving information about Guillermo and his victims.