Just before Michael Crichton came along and starting concocting really neat fantasies involving science and/or medicine – as in Jurassic Park, the original Westworld and the TV series ER – this movie came along in 1966, imagining that to save the life of a critically ill scientist, his colleagues would shrink a team and its submersible craft down to microscopic size and inject them into his bloodstream, for a life-saving mission through his internal bodily systems. This movie has gotten more notice, then and since, for another attention-demanding body: that of Raquel Welch, who co-starred as a team member with especially tight-fitting uniforms. However, it’s the photographic and three-dimensional special effects that are now the thing to watch most closely: charmingly crude, yet somehow, when I saw this as a 13-year-old, completely convincing. That was then. This is now.