Aly Mawji

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.

Kate visits Toby.

The squad works overtime hunting down a serial killer sniper. Maura befriends a man who is a witness to the crime, who happens to suffer from a mental condition that has him believing he is a wolf.