This film was originally introduced to me at about 8 or 9 years of age on a Saturday afternoon and it quickly became a favorite of mine. This film tells the story of a brilliant scientist who is injured on his way to offer the U.S. military some much needed info for miniaturizing people and objects and allowing them to stay in the miniature state beyond the now 60 minute time limit the military is faced with. With a top-notch cast that includes; Stephen Boyd, Edmond O'Brien, Donald Pleasence and Raquel Welch as the medical Dr.'s and scientists that are miniaturized and injected into the scientists body in an effort to repair a wound that can't be fixed through the usual means. The effects in this film are truly amazing and make for a lot of fun as the sub/crew journey through the body and face problems along the way, especially as they are attacked as foreign bodies by the scientist's own natural defense system. If you haven't had the pleasure of seeing this little gem, by all means find it and rent it and if it's been a while, why not revisit this film, I'm amazed at how well it stands up, even after almost 40 years since it's release.