Here's the official synopsis for the season finale for Grey's Anatomy! Check it out for spoilers on the drama that is sure to unfold during the season finale!
A CHANCE REUNION IN THE E.R. BETWEEN TWO LONG LOST LOVERS MAKES EVERYONE REASSESS THEIR PERSONAL LIVES, ON ABC’S “GREY’S ANATOMY”
Demi Lovato (“Sonny with a Chance,” “Camp Rock”) Guest Stars as Hayley, and Marion Ross (”Happy Days”) Guests as Betty
“Shiny Happy People” – 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 -- on “Grey’s Anatomy,” THURSDAY, MAY 13 (9:00-10:01 p.m., ET) on the ABC Television Network.