Terence Young directed this first of a long line of screen adventures with Ian Fleming's unflappable British Secret Service Agent 007 in a fast-paced, tongue-in-cheek style that set the tone for the rest of the popular series. Sean Connery sets the standard by which all future takers must measure themselves as the insouciant and devil-may-care James Bond. The story concerns Bond being sent to Jamaica to investigate the murders of a British agent and his secretary. During his investigation, he comes into contact with the evil and unscrupulous Chinese scientist Dr. No (Joseph Wiseman) who, living on an island called Crab Key, is hard at work in a nuclear laboratory. Dr. No's scheme is to divert rockets being fired from Cape Canaveral off their charted course and to blackmail the United States to get their rocket launches restored to normal. Helping Bond is Ursula Andress (mostly undressed in a bikini throughout most of the film), as well as bad gals like Zena Marshall, who almost leads Bond to his death in her bedroom, and Eunice Gayson, a Bond pickup in a London gambling house who proves herself a greater adversary than even James Bond can handle.
~ Paul Brenner, All Movie Guide