Scott Marks 3 p.m., April 29
Alien vs. Predator
Plural, more accurately: Aliens vs. Predators, facing off in the arena of an ancient pyramid under the Antarctic ice. Notwithstanding the outward hostilities, it's a pragmatic pooling of commercial assets by the Fox studio, profit motive only. A clearer motive, at any rate, than that of the dreadlocked Predators, who, it comes to light, once taught humans to build pyramids (in the assorted styles of Egypt, Mexico, Cambodia), while also using them to breed Aliens, in order to have a worthy prey on which to test their own mettle as hunters. With Sanaa Lathan, Raoul Bova, Lance Henriksen, Ewen Bremner; written and directed by Paul W.S. Anderson. 2004.