Sight Unseen - S3-E5
Continuity mistake: Cole goes to the manor, turns the AC on, knocks a lamp on the ground and opens a window, then shimmers up to the attic. When the sisters come home all the windows are open, but Cole opened only one downstairs.
Chosen answer: Her agent/manager negotiated a special billing as part of her contract. It distinguishes her from the rest of the cast, probably when she became a producer on the show.
JC Fernandez