"Shiny Happy People"  (Season 6 | Episode 22)  43:31
In "Shiny Happy People", an elderly patient admitted into the E.R. for a heart condition sees a familiar face. Karev treats a troubled teenage patient, Hayley (guest star Demi Lovato). Meredith tells Cristina her suspicions regarding Owen. Read our full recap below!
Original Air Date: 5/13/2010