Yankee soldiers-of-fortune smash a spy plot aimed at seizing Hong Kong.

Set in the 18th century, the film recounts the exploits of Rogers' Rangers, a band of adventurers devoted to seeking out a "northwest passage" through Canada. At this juncture, however, Major Rogers is more concerned with helping the British forces at Fort Ticonderoga during a series of French and Indian raids. Fort Ti was filmed in 3D, and in typical William Castle fashion the stereoscopic gimmick is exploited to the hilt.

After a professional art thief steals a religious painting from an Italian museum, he tries to cheat his partner by claiming the painting was accidentally destroyed but his suspicious partner and the police are determined to find it.

Lt. Fergie Howard teams up with Lt. Beau Gilliam and Navy scientist Jason Eldridge to turn a supercomputer with missile-tracking capabilities into a tool to predict where a roulette ball will land. They dock in Venice, Italy, and begin making a killing at the casino, but their shore-to-ship signals get misinterpreted as signs of attack by Adm. Fitch, putting a serious crimp in the officers' get-rich-quick scheme.

During the housing shortage of the 1964 Summer Olympic Games, two men and a woman share a small apartment in Tokyo, and the older man soon starts playing Cupid to the younger pair.