On Sunday, March 13, at 7 p.m. ET/PT, news show 60 Minutes will be airing a preview of George Lucas' work on the final installment of the Star Wars series, Star Wars: Episode III - Revenge of the Sith. Expect to see an exclusive interview that includes behind-the-scenes production work and film footage.

Star Wars goes to Hell in its final episode and the trip may cost it the PG rating the previous five films have earned, says the series creator, George Lucas. The filmmaker speaks to Lesley Stahl and provides a peek at the much anticipated movie for a report to be broadcast on 60 minutes.

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"I don't think I would take a five- or a six-year-old to this," says Lucas of "Star Wars Episode Three: The Revenge of the Sith." "It's way too strong," he tells Stahl.

Lucas is referring to violent scenes in the film and also to Anakin Skywalker's journey to the dark side in the climax of the 30-year-old series. "We're going to watch him make a pact with the devil," Lucas tells Stahl.

This new turn will include the former squeaky-clean Skywalker descending into Lucas' frightening vision of Hell, a mythical planet composed entirely of erupting volcanos. "Yes...the lava at the end...it ends in hell," reveals Lucas.

"[The film] is much more dark…more emotional. It's much more of a tragedy," says Lucas. "My feeling is that it will probably be a PG-13, so it will be the first Star Wars that's a PG-13."

And that's fine with Lucas. "I could pull it back a little bit, but I don't really want to," says Lucas. And Lucas says he isn't bothered by the withering reviews critics gave episodes one and two. "Actually, I am very happy. I'm very pleased with the whole thing," he tells Stahl.