Here's the official synopsis for the next episode of Grey's Anatomy, set to air on January 14. This episode will feature the much-publicized Grey's Anatomy-Private Practice crossover. Read ahead for details about the crossover!
ADDISON RETURNS TO SEATTLE TO PERFORM A DIFFICULT PROCEDURE ON MARK'S PREGNANT DAUGHTER, ON ABC'S "GREY'S ANATOMY"
Guest Starring Kate Walsh ("Private Practice") as Addison Montgomery and Kim Raver ("24," "Lipstick Jungle") as Teddy Altman
"Blink" Mark flies Addison to Seattle to help with a difficult procedure on his pregnant daughter, Sloan, Owen questions Teddy's motives when she assigns Cristina the lead on a complicated surgery, and Derek's suspicions are raised when the Chief recruits Meredith to assist with a high profile operation on, "Grey's Anatomy," THURSDAY, JANUARY 14 (9:00-10:01 p.m., ET) on the ABC Television Network