Hammerhead is a 1968 British Eurospy thriller film directed by David Miller and starring Vince Edwards, Judy Geeson and Diana Dors.

[1] Its plot concerns a criminal mastermind who attempts to steal NATO secrets, with an American agent hot on his trail.

It is based on the 1964 novel of the same title by English novelist James Mayo, and produced by Irving Allen and written by Herbert Baker, who made the Matt Helm films for Columbia Pictures.

British intelligence asks a soldier of fortune, Charles Hood, to go to Portugal and help stop an international criminal mastermind called Hammerhead, who plans to steal a secret report on nuclear defence.

Hammerhead intends to kidnap Britain's NATO delegate, Sir Richard Calvert, and replace him with a lookalike, Andreas, a master of disguise.

"[3] In May 1967, Allen said the project was on a slate of seven movies he had with Columbia, others being: Cromwell; The Black Frontier; The Wrecking Crew; Savage Canary; The Pocket Venus and The Ambushers.