Harry Potter
All eight films, from Harry Potter and the Philosopher's Stone to Harry Potter and the Deathly Hallows: Part 2.
Middle-earth
The Lord of the Rings: The Fellowship of the Ring, The Lord of the Rings: The Two Towers and The Lord of the Rings: The Return of the King, then The Hobbit: An Unexpected Journey and its sequels.
Narnia
The Chronicles of Narnia: The Lion, the Witch and the Wardrobe opens the wardrobe to a third fantasy world.
