Harry ignores warnings not to return to Hogwarts, only to find the school plagued by a series of mysterious attacks and a strange voice haunting him. br br Director: br Chris Columbus br Writers: br J.K. Rowling (novel), Steve Kloves (screenplay) br Stars: br Daniel Radcliffe, Rupert Grint, Emma Watson | See full cast and crew br br Storyline br br Forced to spend his summer holidays with his muggle relations, Harry Potter gets a real shock when he gets a surprise visitor: Dobby the house-elf, who warns Harry Potter against returning to Hogwarts, for terrible things are going to happen. Harry decides to ignore Dobby's warning and continues with his pre-arranged schedule. But at Hogwarts, strange and terrible things are indeed happening: .