The Truth About Killer Dinosaurs is a two-part BBC documentary film, directed by Bill Oddie, in which a group of men test out dinosaur weapons, using studies. Visual effects are done by MPC. The first episode determines the winner of a battle between Tyrannosaurus and Triceratops, and the second compares the strength of an Ankylosaurus and Velociraptor. The episodes were broadcast on BBC One in August and September 2005. In the U.S., The Truth About killer Dinosaurs was also known as Dinosaur Face-Off.