Over the past few years, post-apocalyptic shows have been coming out left and right. From The Last of Us to Paradise's genre-bending Season 2, TV has shown audiences plenty of different scenarios of what the world could look like after doomsday. But while many of these shows became immediate streaming hits after their release, the Netflix original series The Rain also followed a post-apocalyptic storyline, but became a quieter, sleeper hit instead.