At their very best (and very worst), series finales can completely redefine what a TV show is about. Whether through a dramatic plot twist that serves as the perfect climax, an unexpectedly happy or tragic ending, or a revelation that reshapes everything that came before it, the final episode of a series has the power to transform how you see the whole thing in its entirety. Although many TV writers don’t make the most of this power when it comes to ending a project, some put everything they have into creating a climactic finale for their work.