SciFi fans of a Certain Age will no doubt remember the 1966 film Fantastic Voyage starring Stephen Boyd, Raquel Welch, Edmond O’Brien and Donald Pleasance (and written by Harry Kleiner, based on a story by Otto Klement and Jerome Bixby). It features a submarine crew who shrink down to microscopic size and venture into the body of an injured scientist to repair the damage to his brain. (Like you do.)
Two years later, there was an animated version produced by Filmation for television featuring the voice talents of Marvin Miller, Jane Webb, and Ted Knight. It ran for 17 episodes and featured the C.M.D.F. (Combined Miniature Defense Force), a secret United States government organization that possessed the ability to reduce people to microscopic size. (Like you do.) The team consisted of Commander Jonathan Kidd, biologist Erica Lane, scientist Busby Birdwell, and a “master of mysterious powers” known as Guru.
Here’s the pilot episode of Fantastic Voyage!