The Thick of It (2005)

Episode Overview

In celebration of Valentine's Day, Meredith and Derek aim for a quiet evening alone, thanks to Lexie's offer to look after Zola. Callie enlists Mark to babysit, planning a surprise romantic night for Arizona. Meanwhile, Ben shows Bailey that he understands her more than she realizes. As the night unfolds, the ER becomes a hub of love-related incidents, featuring a 10-year-old girl suffering an allergic reaction to chocolates from her valentine and a man who gets struck by a car while pursuing his upset girlfriend.