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.
The screen's most fantastic voyage
Adventure Family Sci-Fi
Stephen Boyd Raquel Welch Edmond O'Brien Donald Pleasence Arthur O'Connell William Redfield Arthur Kennedy Jean Del Val Barry Coe Ken Scott Shelby Grant James Brolin Brendan Fitzgerald Brendon Boone Kenneth MacDonald Christopher Riordan
Harry Kleiner David Duncan Otto Klement Jerome Bixby