Fantastic Voyage

Scientist Jan Benes defects to the West but an assassination attempt leaves him a coma. Agent Charles Grant is recruited by the top-secret organization Combined Miniaturized Deterrence Forces. He learns that he is to be part of a crew aboard a submarine The Proteus and that the crew and submarine will be reduced to microscopic size and injected into the Benes’s bloodstream in order to operate on the surgically inaccessible clot in his brain using a laser. Injected into the body Grant and the surgical team travel through the bloodstream, marveling at the wonders of the human body seen on a microscopic level. They must reach the brain within 60 minutes or else the effect will wear off and they will return to full-size. However the voyage is undermined by one of the crew who is a saboteur and is prepared to risk everything to stop the mission.