The first episode of the final season of Crazy Ex-Girlfriend, which premiered over the weekend, is reminiscent of how Seinfeld ended: with its protagonist, Rebecca Bunch, going to prison for all the antics we've watched her commit over the past few years. Of course, the context is wildly different — unlike Seinfeld locking its characters up as a grand metafictional joke, Crazy Ex-Girlfriend imprisons Rebecca as the payoff for its most surprising narrative thread, a dark and weighty look at the mental health of its lead after a suicide attempt.