The Traveler, whose real name was unpronounceable by Humans, was a mysterious humanoid native to Tau Alpha C and from Tau Ceti, who had the ability to alter space, time and warp fields with the power of his mind. He could phase out of time and dimension and move between planets and starships. These abilities were based on his ability to focus the energy of thoughts and in his advanced understanding of the nature of reality. According to The Traveler, thought was the basis of all reality. In addition, Deanna Troi noted that his presence could not be detected with the empathic abilities of Betazoids. He could also shapeshift to appear as humanoids from other species with different clothing.