"Dad's Back" is the twentieth episode of The Suite Life of Zack & Cody.
The boys' father Kurt (played by Robert Torti) returns. Zack gets tired of living by his mother's boring rules, so Zack sneaks onto his father's bus the day he leaves. Carey decides to become the "fun" parent while Kurt becomes the responsible one. London trains Maddie because of her lack of strength for gym class.