Stranger Things, one of the biggest sci-fi shows of all time, might have disappointed fans with its finale, but one of Netflix’s most underseen sci-fi shows (with a 96% rating on Rotten Tomatoes!) won’t let you down. Released in 2025, the post-apocalyptic sci-fi series is based on an award-winning comic book and has already been renewed for a second season by Netflix. So, if you want to be that annoying friend who “watched it before it was cool,” then you need to watch The Eternaut on Netflix.