The Underwater City

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.

• Frank McDonaldDirector
• Ronald SteinOriginal Music Composer
• Orville H. HamptonWriter

• William LundiganBob Gage
• Julie AdamsDr. Monica Powers
• Roy RobertsTim Graham
• Carl Benton ReidDr. Junius Halstead
• Chet DouglasChuck Marlow
• Paul DubovGeorge Burnett
• Karen NorrisPhyllis Gatewood
• Kathie BrowneDotty Steele
• Edward MalloryLt. Wally Steele
• Edmund CobbMeade (uncredited)
• George DeNormandDr. Carl Wendt (uncredited)
• Paul PowerAuthor in Visiting Party (uncredited)