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
as Capt. Craig McKenzie / Cmdr. Glenn McKenzie
Cesar Romero
as Dr. Malic / Lt. Hastings
宝田明
as Dr. Ken Tashiro
Patricia Medina
as Lucretia
岡田眞澄
as Dr. Jules Masson
Richard Jaeckel
as Perry Lawton
中村哲
as Dr. Okada
中山麻理
as Tsuruko Okada
平田昭彦
as Dr. Sugata
Hikaru Kuroki
as Capt. Kroiga
Linda Haynes
as Dr. Anne Barton
黒部進
as Chin
