Dr. No (film) that followed him. Bond, after overpowering Quarrel and his friend Puss Feller, meets Quarrel's passenger, Felix Leiter, a CIA agent on the same mission as Bond. The CIA has traced the radio jamming signal to Jamaica, but has not determined its exact origin. Quarrel, who is assisting Leiter, reveals that he had been guiding Strangways around the nearby islands to collect mineral samples. He also mentions the reclusive Dr. No, the owner of Crab Key, an island rigorously protected against trespassers by an armed security force. In Strangways' house, Bond finds a receipt from Professor R.J. Dent concerning rock samples.
Motifs in the James Bond film series can be a private island ("Dr. No", "The Man with the Golden Gun"), underwater ("The Spy Who Loved Me"), mountaintop retreat ("On Her Majesty's Secret Service", "For Your Eyes Only") volcano ("You Only Live Twice"), or underground base ("Live and Let Die"), a ship ("Thunderball", "Tomorrow Never Dies"), an oil rig ("Diamonds Are Forever") or even a space station ("Moonraker")—among other variations. Bond usually sabotages the lair and, with time ticking down, dispatches the supervillain, rescues the principal Bond girl and they escape as the place blows up. In some cases, the villain or his primary henchman escapes to launch