PG | | Adventure, Family, Sci-Fi
A scientist is nearly assassinated. In order to save him, a submarine is shrunken to microscopic size and injected into his blood stream with a small crew. Problems arise almost as soon as they enter the bloodstream.
As a college student, director Richard Fleischer was a pre-med student for a while.
I think it's very exciting. We're going to see things no one has ever seen before.
A slice of Capt. Bill Owens' right side of head is missing in the scene in the vein after the arterial-venous fistula incident, probably due to a mismatched matte. (Approx 44 minutes, 57 seconds into the film)
The DVD edition has the following prologue: "The makers of this film are indebted to the many doctors, technicians and research scientists, whose knowledge and insight helped guide this production" The TV/Video version features this prologue instead: "This film will take you where no one has ever been before; no eye witness has actually seen what you are about to see. But in this world of ours where going to the moon will soon be upon us and where the most incredible things are happening all around us, someday, perhaps tomorrow, the fantastic events you are about to see can and will take place."