The Vampire Diaries (2009–2017)
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By the Light of the Moon 

As the full moon nears, Caroline helps Tyler prepare for his transformation. Meanwhile, Damon and Alaric are suspicious when a stranger shows up looking for Mason.


Elizabeth Allen Rosenbaum (as Elizabeth Allen)


Kevin Williamson (developed for television by), Julie Plec (developed for television by) | 2 more credits »




Episode cast overview, first billed only:
Nina Dobrev ... Elena Gilbert / Katherine Pierce
Paul Wesley ... Stefan Salvatore
Ian Somerhalder ... Damon Salvatore
Steven R. McQueen ... Jeremy Gilbert
Sara Canning ... Jenna Sommers
Kat Graham ... Bonnie Bennett (as Katerina Graham)
Candice King ... Caroline Forbes (as Candice Accola)
Zach Roerig ... Matt Donovan
Michael Trevino ... Tyler Lockwood
Matthew Davis ... Alaric Saltzman (as Matt Davis)
Lauren Cohan ... Rose
Michaela McManus ... Jules
Daniel Gillies ... Elijah Mikaelson
Bryton James ... Luka Martin
Randy J. Goodwin ... Dr. Jonas Martin


During the full moon, Damon asks Bonnie to cast a spell to keep Elena incapable of leaving her home. Caroline stays with Tyler, who has imprisoned himself in the Lockwood cellar, to help him during his first transformation to a werewolf. Meanwhile, Jules arrives in Mystic Falls seeking out Mason. Alaric and Damon suspect that she might also be a werewolf. Bonnie meets with Luka expecting to break the moonstone curse using a spell. Elijah visits Elena and proposes a deal to her: she negotiates Stefan's release from the tomb. Damon and Rose grow close to each other and they have an unexpected visitor. Written by Claudio Carvalho, Rio de Janeiro, Brazil

Plot Summary | Plot Synopsis


TV-14 | See all certifications »

Did You Know?


Tyler turns into a werewolf for the first time. See more »


When Jules slams her drink down on the bar, it splashes over her bare hand, and she shows no reaction. Damon had spiked the drink with wolfsbane, therefore it should have burned her hand like acid. See more »


Bonnie Bennett: [as Elena comes down the stairs] Where are you going?
Elena Gilbert: Um... to see Stefan.
Bonnie Bennett: You're lying.
Elena Gilbert: No, I'm not.
Bonnie Bennett: Really? Tell your face.
Elena Gilbert: Are you serious?
Jeremy Gilbert: [on the landing behind them] She took the moonstone.
[has handbag Elena took it from]
Elena Gilbert: How did you...?
Bonnie Bennett: We tested you. You failed.
See more »


References The Incredible Hulk (1977) See more »


I'm Alright
Performed by Agent Ribbons
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User Reviews

okay since episode seven its kinda been a step down
25 December 2020 | by jackDee-56565See all my reviews

Okay this episode was fine, I liked some of it, but one character dies and nothing I did not feel a damn thing as the character really wasn't in it that long so who cares, overall an okay episode but somewhat meh at points

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Release Date:

9 December 2010 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

1.78 : 1
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