Kate Walsh returned to Grey's Anatomy as Addison to drop a shocking revelation about her marriage. During the Thursday, January 29, episode of the hit ABC series, Addison paid a visit to Amelia (Caterina Scorsone), who was still on sabbatical from Grey Sloan Memorial Hospital. The doctors both helped to assist with a pregnant patient who was suffering from a tumor that affected her sight. In an effort to get Amelia to scrub back in, Addison revealed that her marriage to husband Jake (Benjamin Bratt) might be over.