Thunder Island is a 1963 American action film directed by Jack Leewood, written by Don Devlin and Jack Nicholson, and starring Gene Nelson, Fay Spain, Brian Kelly, Míriam Colón, Art Bedard and Antonio Torres Martino.

[1] The film was made by Robert L. Lippert's Associated Producers and released in September 1963, by 20th Century Fox.

Contract killer Billy Poole is hired to assassinate a South American dictator.

When he arrives, he and associate Anita Chavez arrange to have an innocent bystander, advertising man Vincent Dodge, take them by boat to the intended victim's island compound, holding Vincent's wife Helen hostage.

Robert L. Lippert was impressed with Nicholson's work and hired him as a writer and actor for Flight to Fury shot in the Philippines.