A massive underwater volcano erupts and puts a group of investigative scientists in danger. They are rescued by an atomic super submarine named The Alpha under the command of Captain McKenzie. The group is quickly taken to a vast underwater city known as Latitude Zero, a fantastic, Atlantean type utopia, a world beneath the ocean with its own sun. It is soon discovered that Captain McKenzie is at war with the evil Dr. Malic, a cruel scientist who wishes to rule mankind all the while conducting genetic experiments on humans and animals. Malic sends his agents to kidnap Dr. Okada, a human scientist who has created a serum that can immunize exposure to radiation.
Joseph Cotten
Capt. Craig McKenzie / Cmdr. Glenn McKenzie
Cesar Romero
Dr. Malic / Lt. Hastings
Akira Takarada
Dr. Ken Tashiro
Masumi Okada
Dr. Jules Masson
Richard Jaeckel
Perry Lawton
Patricia Medina
Lucretia
Mari Nakayama
Tsuruko Okada
Akihiko Hirata
Dr. Sugata
Tetsu Nakamura
Dr. Okada
Hikaru Kuroki
Capt. Kroiga
Hitoshi Ōmae
Kobo
Linda Haynes
Dr. Anne Barton
Susumu Kurobe
Chin
Haruo Nakajima
Griffon / Giant Rat / Bat Man
Hiroshi Sekita
Warren / Bat Man
