Ice Age: Dawn of the Dinosaurs (PG, 2009)

The prehistoric pals from the first two Ice Age movies are back, and now their inter-species herd is about to grow. Wooly mammoth Ellie (voiced by Queen Latifah) is expecting a baby, turning partner Manny (Ray Romano) into an overprotective, nervous father-to-be. Meanwhile, saber-toothed tiger Diego (Denis Leary) realizes that he's lost his edge when he can't even capture easy prey and decides to leave the overly domesticated herd. And Sid (John Leguizamo), who's worried he won't belong when the baby arrives, takes matters into his own hands and swipes three eggs he finds under the ice. The triplets turn out to be baby T-rexes -- who have an understandably angry mama. The gang must band together to save Sid from the clutches of the underground dinosaur world that thrives just below their own icy surface.

Story-wise, ICE AGE: DAWN OF THE DINOSAURS is less compelling than its predecessors. While the first two were humorous character studies of unlikely prehistoric friends, the "threequel" is much more about the action. Audiences already know how the main characters interact, so the focus shifts to the dangerous search for Sid and the obstacles that Manny, Diego, Ellie, and her nitwit twin "brothers" (Josh Peck, Seann William Scott) face. This works fine for the movie's 3-D scenes, but in the process the movie loses a tiny bit of the franchise's humor and heart.

The only memorable new additions are Buck (British comic actor Simon Pegg), a hermitic warrior weasel who guides the crew to Sid, and the three dinosaur babies, who can't play well with their Ice Age friends (a playground scene hilariously turns into an unlikely feast as the triplets swallow their new playmates). And arguably the best new character doesn't utter a single word: Scrat's love interest, Scratte, a winged female creature who desires that elusive acorn just as much as her beloved. Scrat and that acorn are the perfect animated example of physical comedy, and their scenes alone are worth a trip to the multiplex.