An engineer, a psychologist and several other disparate types take part in an experiment to see if people can live for extended periods of time in a city built under the ocean.
as Bob Gage
as Dr. Monica Powers
as Tim Graham
as Dr. Junius Halstead
as Chuck Marlow
as George Burnett
as Phyllis Gatewood
as Dotty Steele
as Lt. Wally Steele
as Meade (uncredited)
as Dr. Carl Wendt (uncredited)
as Author in Visiting Party (uncredited)
