Commander Lyle Tiberius Rourke (or better known as Lyle Tiberius Rourke or Commander Rourke) is the hidden main antagonist of Disney's 41st full-length animated feature film, Atlantis: The Lost Empire. He is one of the very few Disney villains who does not initially appear to be evil, but gradually shows his villainy over the course of the film. He initially appears as a very respectable and praiseworthy commander, but as the movie progresses, he turns out to be a manipulative, ruthless, and crazed mercenary out to capture the Heart of Atlantis and make money off of it.