By the Light of the Moon

By the Light of The Moon is the eleventh episode of the Second Season and the thirty-third episode in the series.

Summary
thumb|303px|right|By The Light of The Moon Promo TYLER FACES HIS FIRST TRANSFORMATION - As the full moon approaches, Caroline helps Tyler prepare for the transformation, he is powerless to stop. While and  play mind games on one another,  and  are suspicious when a stranger named Jules shows up in Mystic Falls, searching for her friend Mason. is frustrated at the lengths and her friends have gone to in order to keep her safe. and Luka work together on a spell, while still keeping secrets from one another. Finally Elijah makes an unexpected appearance with an offer that could change everything.

Main Cast

 * Nina Dobrev as Elena Gilbert/Katherine Pierce
 * Paul Wesley as Stefan Salvatore
 * Ian Somerhalder as Damon Salvatore
 * Steven R. McQueen as Jeremy Gilbert
 * Katerina Graham as Bonnie Bennett
 * Candice Accola as Caroline Forbes
 * Zach Roerig as Matt Donovan
 * Michael Trevino as Tyler Lockwood
 * Sara Canning as Jenna Sommers
 * Matt Davis as Alaric Saltzman

Recurring Cast

 * Daniel Gillies as Elijah Mikaelson
 * Lauren Cohan as Rose
 * Taylor Kinney as Mason Lockwood (re-used fotagge)

Guest Cast

 * Michaela McManus as Jules
 * Bryton James as Luka Martin

Trivia

 * Antagonist: Jules
 * This episode had 3.16 million viewers in USA.
 * This is the fourth episode to have all the main characters in it. The previous three episodes are Plan B, Masquerade and The Sacrifice.
 * It is the last episode before winter hiatus.
 * Tyler's transformation was in this episode. Filming the transformation took about 14 hours.
 * Elena, Damon, Stefan and Caroline are the only characters who have appeared in every episode of the first half of season 2, with the exception of Tyler, who has appeared in all but one episode, Katerina.
 * Jenna and Matt have appeared less in the first half of season 2 compared to season 1, where Tyler appeared less than all the main characters.
 * Michaela McManus (Jules)' real-life fiancee (Mike Daniels) wrote this episode.
 * Jules meets Tyler, Matt, Alaric and Damon in this episode.
 * Elijah meets Jenna, and finally Katherine (in the present) in this episode.
 * This is the first mid-season finale to feature Katherine.

Quotes
Stefan: (to Katherine) "The pleasure I'll get of watching you suffer is greater than any pain I'll ever feel."

Damon: "I've been marked. What the Hell kind of wolf pronoun stuff is that anyway?"

Elijah: "Good evening, Katerina. Thank you for having the good sense to be frightened."

Rose: (To Damon) "I don't love men that love other women. I think more of myself then that."

Elena:"Do you think this is funny?"

Damon: "Yes, Elena, I find hilarity in the lengths I need to go to save your life."

Rose: "I`m gonna help you."

Damon: "Help me do what?"

Rose: "Save Elena. Protect Elena. All things Elena."