Yes! We like our nano-bots to be stacked and have plenty of cleavage!
Raquel was one hot babe.
The United States and the Soviet Union have both developed technology that can miniaturize matter by shrinking individual atoms, but only for one hour. (The novel stated that the duration of miniaturization is inversely proportional to its degree. A 50% reduction, say, could be maintained for many days, but a reduction to microbial size could last for only an hour.)
Scientist Dr. Jan Benes (Jean Del Val), working behind the Iron Curtain, has figured out how to make the process work indefinitely. With the help of American intelligence agents, including agent Charles Grant (Boyd), he escapes to the West, but an attempted assassination leaves him comatose with a blood clot in his brain that no surgery can remove from the outside.
To save his life, agent Grant, pilot Captain Bill Owens (Redfield), Dr. Michaels (Pleasence), surgeon Dr. Peter Duval (Kennedy), and his assistant Cora Peterson (Raquel Welch) are placed aboard a Navy submarine (originally designed to study the deep-sea spawning habits of fish) at the Combined Miniature Deterrent Forces facilities.
The submarine, named Proteus, is then miniaturized to “about the size of a microbe”, and injected into Benes. The team has 60 minutes to get to and remove the clot; after this, Proteus and its crew will begin to revert to their normal size, become vulnerable to Benes’s immune system, and (in the words of Asimov’s novelization) “kill Benes regardless of the success of the surgery.”