Ray Bradbury's Something Wicked This Way Comes: The Authorized Adaptation #1

A carnival comes to Green Town and the curious boys Jim and Will begin spying on its owners, discovering they possess dark powers and can transform visitors into members of their troupe. The boys turn to Will's librarian father for aid while Jim must resist the temptation to join the carnival's ranks. Guided by Will's father, the boys triumph over Mr. Dark.