I don’t recall at the moment if this started as a direct remake/sequel to Fantastic Voyage, was merely inspired by it openly, or just has a similar concept, but I do know that I was first made aware of the existence of Innerspace when researching Voyage. I have dim recollections that it might be a “suggested by” treatment of the novel sequel to Voyage?
Anyway, I also just discovered it has Martin Short as the hapless fellow who doesn’t realize he’s got a tiny explorer inside him, which ramps up my interest in it. Also, the idea of cutting back to comedy sequences outside caused by what’s going on inside reminds me of Osmosis Jones, only with live action/VFX instead of cartoon animation.
I suppose I shouldn’t be so surprised a movie known for one sequence (slow-motion astronauts) is over three hours long. After all, Lawrence of Arabia is mainly known for the desert montage. I am surprised to learn the scope of the movie. I always understood it to chronicle the Mercury program, and possibly Gemini leading to Apollo. But I’m now seeing it described as starting with breaking the sound barrier. On reflection, supersonic speed would have come from the same test programs that produced the Space Race astronauts, but I never connect aeronautics and astronautics.
I should address that I somehow got the idea the film was made in the 60s, which is ridiculous, since it chronicles the 60s. But on the rare occasions I thought about that, I considered it kind of a propaganda film doing a victory lap after a successful moon landing. Which would still probably make it early 70s, but that’s quibbling.