TV series superdog escapes from the backlot under the impression his powers are real. (Shades of The Truman Show.) Even the vast possibilities of computer animation can’t convince us of this particular possibility. Once the canine hero, about two-thirds of the way through, awakens to his limitations and discovers his inner dogginess, the film warms up. With the voices of John Travolta, Miley Cyrus, Susie Essman, and Mark Walton; directed by Bryan Howard and Chris Williams. (2008) — Duncan Shepherd
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