Rick and Morty has made a name for itself for its caustic tone, its devil-may-care approach to storytelling, and its counterculture identity of being the show that proves that everything you like is stupid and that caring about the world is a waste of time. But where Rick and Morty really succeeds is in its gritty exploration of science fiction, and last night’s episode “The Vat of Acid Episode” reminded me why I fell in love with the series in the first place. While the previous two episodes have placed the sci-fi in the backseat to …