Harry Potter and the Sorcerer's Stone

Harry Potter grows up mistreated by his aunt and uncle until, at 11, he learns he's a wizard and famous: as a baby he survived the attack by Voldemort that killed his parents. At Hogwarts he's sorted into Gryffindor, befriends Ron and Hermione and picks up a rival, Draco Malfoy. The trio suspects someone is after the Sorcerer's Stone hidden in the castle, and they blame Snape. Getting past the defenses around the Stone, Harry finds the real villain is Professor Quirrell, who carries Voldemort on the back of his head. The Mirror of Erised gives Harry the Stone, and his touch burns Quirrell. Dumbledore says the Stone will be destroyed and that his mother's love protects Harry. Gryffindor wins the House Cup. Left open: Voldemort got away.

1. ChangePeeves was filmed, then cut

   In the book, Peeves the poltergeist is always causing trouble in the castle. Rik Mayall shot scenes as him, but all of it was left out of the final cut.

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2. ChangeThe potion riddle is gone

   In the book, one of the tasks guarding the Stone is a logic puzzle with potion bottles, and Hermione solves it. The film skips it; Chris Columbus said he didn't have time to shoot it.

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3. ChangeFire in the book, sunlight on screen

   In the book, Hermione drives off the Devil's Snare with bluebell flames. In the film, Ron panics and Hermione saves him with a sunlight spell.

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4. ChangeNorbert leaves without the tower trip

   In the book, Harry and Hermione haul the dragon up a tower so friends of Charlie, Ron's brother, can fly him to Romania. In the film, Hagrid just says Dumbledore sent Norbert away.

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5. ChangeJust one centaur in the forest

   In the book, Harry meets several centaurs in the Forbidden Forest, including Ronan and Bane. In the film, Firenze is the only one who shows up.

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