We'll get to Spielberg, Ford, and all manner of chases, escapes, and effects soon enough, but allow me to ask: Has any performer ever seemed as irrepressibly, irresistibly happy on-screen as Karen Allen in Indiana Jones & the Kingdom of the Crystal Skull?

Rene Russo, Jason Alexander, Robert De Niro, Rocky, and Bullwinkle in The Adventures of Rocky & BullwinkleTHE ADVENTURES OF ROCKY & BULLWINKLE

One of the happier surprises of last summer was the release of South Park: Bigger, Longer, & Uncut, a marvelously written musical comedy that transcended its source material and shot off into a madcap animated universe all its own, raising the bar for all future TV-show-turned-feature-film projects. And while it would be great to report that the film version of The Adventures of Rocky and Bullwinkle approached South Park's level of cinematic exuberance, the filmmakers are facing an uphill battle: The animated series this one is based on is already such a whirligig of action, cliffhangers, and verbal and visual puns that raising the ante on it as a movie seems kinda pointless. (Clever and funny though it often is, the South Park TV series has nothing on the brilliance of the original R & B series.)