Characters played by Richard Karn
Self - host
Characters played by Erich von Däniken
Self
Characters played by Matthew Golombek
Self - Mars Pathfinder Project
Characters played by Daniel Goldin
Self - NASA administrator (archive footage)
Characters played by Bill Clinton
Self (archive footage)
Characters played by David Leckrone
Self - senior scientist, Hubbel Telescope
Characters played by Rudolf Gantenbrink
Self - robotics engineer
Characters played by Graham Hancock
Self - author
Characters played by Neil Steede
Self - Meso-American archeologist