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. This is the only Halloweentown movie to not feature Kimberly J. Brown as Marnie Piper. The premiere scored 7.8 million viewers. The DVD was released on August 29, 2007.
Marnie discovers that she is responsible for the universitys restriction of magic. The university was originally established only for warlocks and witches to learn how to use magic, but when the portal was opened, most of them went to college in the mortal realm. Since then, Witch University has allowed nonmagical mortals to attend. The classes are boring for Marnie until a box, with the name S. Cromwell inscribed on it, magically appears in front of her. Marnie meets with one of her professors, Miss Periwinkle Millicent Martin, and asks for an explanation. Periwinkle only tells Marnie that the S. stands for Splendora.Marnie and Dylan learn that the box contains the Gift, a magical power only a Cromwell can use, which Splendora locked in the box centuries ago. Meanwhile, the Sinister sisters use Dylans infatuation with them to make him do their homework. ........
Source: Wikipedia