Penguins of MadagascarPENGUINS OF MADAGASCAR

Penguins of Madagascar opens with a sweeping overhead shot of an (animated) Antarctic expanse, which eventually lands on an orderly march of flightless waterfowl. This introduction is narrated by a documentarian voiced by Werner Herzog, who informs us, in the director's unmistakable German-accented English, that we're to witness penguins in all their natural glory - right before he orders a crew member to shove a few off a cliff, just to see what will happen. Between Herzog, the environmental-doc satire, and the sheer goofiness of it all, this prelude is such a fantastically funny way to start directors Eric Darnell's and Simon J. Smith's spin-off that it immediately leaves you anticipating a movie that'll be smart and hilarious throughout. Would you settle, though, for smart and moderately amusing?

Jonah Hill and Channing Tatum in 21 Jump Street21 JUMP STREET

As an undercover police officer who, in 21 Jump Street, can say to his platonic partner "I cherish you, man" in a way that's both hysterical and intensely touching, Jonah Hill possesses a rare gift for completely unembarrassed sincerity. By now, it should go without saying that Hill is a sensational verbal comedian and a fearless physical one. But as in his bro-mantic scenes opposite Michael Cera in Superbad, the actor brings to this action comedy something few others would think to: absolute honesty and emotional transparency. Hill is funny as hell here, but his character is never a joke.

Russell Crowe in Robin HoodROBIN HOOD

With director Ridley Scott's heavy-spirited adventure Robin Hood, the audience waits nearly an hour for its first reprieve from the grimness and grime, and when it finally arrives, the moment consists of Max von Sydow's blind land baron getting a whiff of Russell Crowe's gamy Robin and growling, "You stink." As mood lighteners go, so does that gag. And so, for the most part, does the movie.

Diane Lane and Olivier Martinez in UnfaithfulUNFAITHFUL

Diane Lane has been a terrific performer for close to 25 years without really becoming a star, yet that's destined to change with Unfaithful, the hypnotic new Adrian Lyne thriller that gives Ms. Lane the chance to show, when granted the right material, how incredibly fine she can be.