An alien held captive in a top secret American military base escapes and hides out in the van of two English comic-book geeks on a tour of UFO hotspots. The wisecracking extraterrestrial enlists the duo's help in getting back to his spaceship, but they are soon pursued by government agents and unwittingly become kidnappers. Sci-fi comedy, starring Simon Pegg and Nick Frost, with the voice of Seth Rogen.