Grey’s Anatomy - Season 6 Episode 22

An elderly patient admitted into the E.R. for a heart condition sees a familiar face, a long lost love who happens to be in the E.R. as well for a fractured arm, and the staff find themselves caught up in their love story. Meanwhile, Karev treats a troubled teenage patient (guest star Demi Lovato) whose parents brought her in for schizophrenia, and Meredith can\’t help but tell Cristina about her suspicions of Owen — which inevitably messes with Cristina\’s head.