Greg Dorr’s review published on Letterboxd:
Decent but overlong big budget Hollywood fantasy/adventure from back in the days when spatial continuity was never a concern.
Jules Verne's famous story about the crazy Bond-villainesque Captain Nemo and his luxury Civil War-era submarine has an intriguing set-up and a fine ending, but gets too whimsical in the middle with lowlights like a wackily whooping cannibal tribe and Kirk Douglas singing a duet with a seal.
Aimless at times, it needed a more constant and escalating sense of menace. But the giant squid was pretty cool. Not H.G. Wells-cool, but not bad either.