Starring Stephen Boyd (was Rod Taylor busy?), Raquel Welch (the only person whom the form-fitting costumes flatter), Donald Pleasence (who looks kind of like Moby), Arthur Kennedy (a once-interesting actor who now looks like he could use a good colonoscopy) and Edmund O'Brien (just a pretty, pretty man). The special effects are nifty. The science is Tom Swifty. It's probably 1,000 times better when you see it on the big screen and you're either a) high, or b) 13, or c) both.

Still packs an unusually potent punch.

Enjoyable. My favorite scene is when Raquel Welch is attacked by the antibodies. !?!?

The color work and the animation are first-rate

It's not that great. Watchable and occasionally amusing, but mostly due to cheesy effects and a dated psychedelic aesthetic.

Exists only to show off the fanciest effects of its day. Completely hollow otherwise and painfully awkward when compared to modern sci-fi.

Science fiction is the one genre probably most at risk of looking dated quickly, due to its reliance (in most cases) on special effects and on technology that is often just slightly out of reach and that's often central to many people's criticisms of certain movies. While it might look out of date and cheesy by today's standards, this is a film that deserves to be looked at in the context of the time that it was made.

The effects might have been great for its day, but their looking dated isn't the biggest problem here. It's that this film plods along. It has maybe 60 minutes of material painfully stretched into 120. If you enjoy watching people in labcoats stand around doing literally nothing and golfcarts driving up ramp after ramp, then watch this. But have something else to keep you busy during the downtimes.

dated badly but still very enjoyable to watch.. effects well ahead of its time... all medical people should watch it; inner ear and alveoli sets are very real...

An overlooked sci-fi classic. Never particularly gripping, but who knew the human body could be so psychedelic?

Fantastic Voyage was certainly ambitious and does capture the imagination to a degree, but it was simply a little too far ahead of its time to pull everything together properly. Although the special effects are pretty good, the psychadellic nature of the human body certainly seems a little misplaced, if at lower production cost. The main flaw is the lack of real event and purpose as everything plods along at a grindingly slow pace. It's still somewhat of a classic however and worth a viewing.

It hasn't aged well, with, among other things, its corpuscles that now look like throw pillows more than anything -- but I first saw this as a kid when it was still fresh and new, so for me it still retains some of the gosh-wow quality I originally got from it. It's essentially a theme-park ride. But I love the concept, love Donald Pleasance as the villain, and still believe that the voyage is (mostly) fantastic.

Interesting Sci fi.

An inpiring old sci-fi classic.

This story is about the thing we are closing to get with computers: medical helper microrobots to fix inside of us. Honey, to shrink the kids, then again, is as ridiculous as it sounds. The forklift for miniature sub was the most funniest invention.

What would've been amzing in 1966 has dated badly, though Donald Pleasance is always good value