The first 5 seasons of the show are definitely worth watching, as I believe season five has a good enough ending, where the show could’ve finished all together. Season 6 however does take a detour as it mainly focuses on this new characters who’s stories also end in season 6. Recently the 7th and final season had been released on Netflix although it is one of the better seasons, I believe a good recap should be in place before watching and a lot relies on previous seasons. It is a good ending a nice way to end the show and round off the characters stories.