Commander Lyle Tiberius Rourke is the hidden main antagonist of 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 respectable, practical, and composed expedition commander and leader, but as the movie progresses, he turns out to be a ruthless and evil mercenary out to capture the Heart of Atlantis and make money off of it. He kidnaps Princess Kida after she is consumed by the crystal to steal it, nearly killing all of the Atlanteans. Rourke meets his demise on board his own air balloon whilst fighting Milo Thatch. He was voiced by the late James Garner.