A group of communist spies plan to blow up an essential commercial artery, the Panama Canal. To this end, they have kidnapped a nuclear scientist and are traveling by steamship to the coast of South America. Luckily for western civilization, the hard-nosed ship's captain, played by Barton MacLane, has other ideas.

• Lincoln Productions Inc.
• Barton MacLane
• Virginia Grey
• Leif Erickson
• Peter Coe
• Rudolph Anders
• Howard Wendell
• Isabel Randolph
• Paul Brinegar