Harry in the goblet of fire. In this movie Harry without his knowledge is choser for the triwizard competition(a competition where 3 students r chosen each from 3 wizarding schools n they have to go through 3 rounds to prove their mettle). In the end of the competition Harry to know that he had bin entered into the competition by Voldemorts supporter impersonating a teacher so that Harry cud get to Voldemort, Voldemort cud be revived from the near to death life he has bin living ever since he was unable to kill Harry as a baby.