So, how did Oz gets its Wizard? This question has never exercised me for more than a nanosecond, but as redundant as Oz the Great and Powerful might seem, this Disney prequel turns out to be something of a classic: a family friendly fantasy which delivers as an affectionate prologue to The Wizard of Oz, that works just as well as a spectacular, neatly structured stand-alone adventure. It's directed by Sam Raimi, who once again brings irresistible enthusiasm to cartoonish genre entertainment, but it could also pass for the best Tim Burton film in a long time, and the best Terry Gilliam film in even longer.