Over the course of four movies (and one Christmas special) our prehistoric animal cast has encountered ice ages, ends of ice ages, dinosaurs, Santa Claus and, now, the breakup of the Pangaean supercontinent. This makes for one hell of a confusing timeline, jumping randomly trough roughly 200 million years of geologic history. Not that the kiddies care. They just think Scrat is funny. In this fourth outing, our computer-animated heroes (voiced as always by John Leguizamo, Denis Leary and Ray Romano) are fighting pirates. Another valuable history lesson for the kids. 94 minutes PG.