how are the vampire diaries related to the originals?
The Originals, a spin-off from The Vampire Diaries, centers on three of the Mikaelson siblings: Klaus (Joseph Morgan), Elijah (Daniel Gillies), and Rebekah (Claire Holt). ... Niklaus "Klaus" Mikaelson is a descendant of a witch and a werewolf, and his quest to unleash his hybrid nature was detailed in The Vampire Diaries.