The Vampire Diaries: - Season 2

: The season introduces Elijah and Klaus Mikaelson , the world's first vampires. Klaus , a vampire-werewolf hybrid, serves as the season’s primary antagonist.

: Katherine returns to Mystic Falls with a plan to use Elena Gilbert to break a centuries-old curse involving a moonstone, vampires, and werewolves. The Vampire Diaries - Season 2

The season consists of 22 episodes that aired on from September 2010 to May 2011. Saying Farewell to 'The Vampire Diaries' | The Nerd Daily : The season introduces Elijah and Klaus Mikaelson

: Transformed into a vampire by Katherine, Caroline evolves from a "shallow" high school girl into a confident, strong supernatural being. the world's first vampires. Klaus