SPOILER ALERT: The story includes details about Episode 2210 of ABC’s Grey’s Anatomy, “Strip This Down”. The extended hiatus of Grey’s Anatomy cast member Caterina Scorsone came to an end in tonight’s episode, which also marked the return of Grey’s alumna Kate Walsh after a three-year break. The mom-to-be’s condition rapidly worsens, with Addison convincing Amelia — again reluctantly — to restore her privileges and scrub in. After Addison loses her cool in the OR, jeopardizing the patient, she is kicked out by Amelia who successfully completes the surgery. Walsh, who had left Grey’s Anatomy to headline spinoff Private Practice, has done guest stints on Grey’s following the spinoff’s end.