: Forced to face her heritage as a Petrova doppelgänger, Elena becomes more active in her own survival, eventually sacrificing herself (and being brought back) during Klaus's ritual. Episode Guide
: The Lockwood family curse is triggered when Tyler Lockwood accidentally kills a peer, leading to his first transformation and the introduction of his uncle, Mason Lockwood. Major Character Evolutions 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 : Forced to face her heritage as a
: Transformed into a vampire by Katherine, Caroline evolves from a "shallow" high school girl into a confident, strong supernatural being. strong supernatural being.