Cold War thriller adapted by Frederick Forsyth from his own bestseller. When Soviet spy Valeri Petrofsky (Pierce Brosnan) is charged with bringing about the demise of NATO, he decides his best bet is to detonate an American nuclear bomb at a British air base. The only man who can stand in his way is veteran counter-espionage expert John Preston (Michael Caine), but he must fight the opposition of his bosses before they agree to take the threat seriously.

Tenth entry in the 'Carry On' series. Able seaman Poop-Decker (Bernard Cribbins) signs up for adventure on the high seas with the wicked Captain Fearless (Kenneth Williams). Those swabbing the decks include Juliet Mills, Charles Hawtrey and Donald Houston. The film was originally to be entitled 'Up the Armada', but the British Board of Film Censors objected to such a rude title.