The Lawgivers
"The Return of the Archons"
Strange, shrouded figures stalk all visitors to a planet where human beings must either be "absorbed" into a central body - or annihilated. Kirk and his men must uncover the secret of the ghost-like dictator "Landru" who commands all life forms on the planet. Finally, by working with a timid underground, they confromt and destroy Landru - a computer!