Return to Halloweentown (also known as Halloweentown IV: Witch U.) is a Disney Channel Original Movie that premiered on October 20, 2006. It is the fourth and final installment in the Halloweentown series. In this sequel, Marnie Piper (Sara Paxton) and her brother, Dylan Piper (Joey Zimmerman), go to Witch University to attend college in Halloweentown. While at college, dark forces try to control her magic.