This dull prequel to The Wizard of Oz stars James Franco as fairground mountebank Oscar Diggs, who's swept away by a whirlwind from monochrome 1905 Kansas to Technicolor Oz where he's mistaken for the Wizard sent to free the simple locals from the tyrannical Wicked Witch. The archetypal American confidence trickster with the gift to inspire, Oscar uses his newly acquired Edisonian cinematic know-how to win the day. The film has lots of computer-generated special effects but no magic. It does have flying monkeys and the Munchkins, but crucially it lacks Dorothy and Toto; the Cowardly Lion, the Tin Man and the Scarecrow; songs by Harold Arlen and Yip Harburg; and Margaret Hamilton either on a bike or a broomstick.