 The film was actually completed by Warren in 1957, but remained unreleased until it was distributed in April 1960 on a double feature with Warren's "Teenage Zombies".Professor Millard Wyman (John Carradine) sends a crew of two men, Paul Whitmore (Allen Windsor) and Craig Randall (Robert Clarke), and two women Lauri Talbott (Sheila Noonan) and Dale Marshall (Phyllis Coates), down to ocean depths never before explored.But, there's a technical problem during the launch.