season 3

Season three opens the door to learn more about Klaus and The Original Family as his motives for wanting Stefan on his side are finally revealed. As Stefan sinks deeper into the dark side, Damonand Elena struggle with the guilt of their growing bond even as they work together to bring Stefan back home. The ghosts fromJeremy’s past have a powerful message they’re trying to deliver to him, not to mention the impact they’re having on his relationship with Bonnie Bennett; as Caroline and Tyler grow closer, a war erupts between their families.

The series stars Nina Dobrev as Elena Gilbert, Paul Wesley asStefan Salvatore, Ian Somerhalder as Damon Salvatore, Steven R. McQueen as Jeremy Gilbert, Kat Graham as Bonnie Bennett,Candice Accola as Caroline Forbes, Zach Roerig as Matt Donovan, Michael Trevino as Tyler Lockwood, Matt Davis as Alaric Saltzman and Joseph Morgan as Klaus.

Based on the series of books by L. J. Smith, THE VAMPIRE DIARIES is from Alloy Entertainment and Bonanza Productions Inc in association with Warner Bros. Television and CBS Television Studios with executive producers Kevin Williamson ("Scream," "Dawson's Creek"), Julie Plec ("Kyle XY," "Wasteland"), Leslie Morgenstein ("Gossip Girl," "Private") and Bob Levy ("Gossip Girl," "Privileged").

in season 3 Stefan has to team up with the evil klas in order to save his brother Damon after he was bitten by a werewolf and nearly on the verge of death. so Stefan had to go to klas and trade his service to klas for klas's blood.