The film follows Bond's mission to find two NATO atomic bombs stolen by SPECTRE, which holds the world for ransom of £100 million in diamonds under its threat to destroy an unspecified metropolis in either the United Kingdom or the United States (later revealed to be Miami). The search leads Bond to the Bahamas, where he encounters Emilio Largo, the card-playing, eye patch-wearing SPECTRE Number Two. Backed by CIA agent Felix Leiter and Largo's mistress, Domino Derval, Bond's search culminates in an underwater battle with Largo's henchmen. The film's complex production comprised four different units and about a quarter of the film comprised underwater scenes. "Thunderball" was the first Bond film shot in widescreen Panavision and the first to have a running time of over two hours.