Most sci-fi TV is more about action and spectacle than anything thoughtful, but one show that really did the intellectual side of science fiction justice wasPrisoners of Gravity, which aired on TVOntario from 1989 to 1994. On the show,host Rick Green used science fiction to explore far more serious topics. “You’re talking with people who are really imaginative,” Green says in Episode 261 of the Geek’s Guide to the Galaxy podcast.

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