"Thunderball" is a 1965 British spy film, the fourth in the James Bond series produced by Eon Productions. The film stars Sean Connery as James Bond, and is based on the novel of the same name by Ian Fleming. The film was directed by Terence Young, who directed the first two Bond films, "Dr. No" (1962) and "From Russia with Love" (1963).

In "Thunderball," Bond is tasked with investigating the theft of two NATO atomic bombs by the terrorist organization SPECTRE, and must race against time to prevent the bombs from being used for blackmail. The film features a number of thrilling action sequences, as well as memorable Bond girl characters and an iconic theme song, "Thunderball," performed by Tom Jones.

"Thunderball" was a major box office success, grossing over $141 million worldwide, and was widely praised for its stunning visuals, exciting action, and Connery's charismatic performance as Bond. The film is widely considered to be one of the best in the Bond series, and is remembered for its innovative underwater sequences and its dramatic climax, set in a Bahamian lagoon.

Today, "Thunderball" remains one of the most beloved and iconic Bond films, and continues to be a favorite among fans of the franchise.