Catacombs conceal holy ground beneath a temple in San Francisco's Chinatown.
Adam helps a frightened psychic prevent a catastrophe.
Adam helps a pregnant woman who is searching for a family member.
Adam escapes the FBI; the hunter must be forced back to his planet to save Earth.
FBI agents capture Adam and try to get him to talk; Col. Vise discovers their whereabouts.
The visitor reunites with his sick wife (Barbara Bain).
Adam stumbles upon a haunted house that is also an alien landing site.
Adam gets into serious trouble while trying to find a Vietnam War veteran who can help him prevent a catastrophe.
The leader of a group of alien abductees may have devious intentions.
Adam needs a scientist to help him decode an interplanetary message.
Adam meets his adult granddaughter.
Adam helps a scientist complete an anti-gravity project and uses their discovery to escape in an old fighter plane.
A pilot who disappeared over the Bermuda Triangle 50 years earlier resurfaces unaged when a UFO crashes on Earth.