Robbie Amell Stephen Jameson Actor Luke Mitchell John Young Actor Peyton List Cara Coburn Actor Aaron Yoo Russell Kwon Actor Mark Pellegrino Dr. Jedikiah Price Actor Madeleine Mantock Astrid Finch Actor Simon Merrells Guest Star Alexa PenaVega Guest Star Jeffrey Pierce Guest Star Greg Berlanti Executive Producer Julie Plec Executive Producer Phil Klemmer Executive Producer Danny Cannon Executive Producer Thom Beers Executive Producer Craig Cegielski Executive Producer Oz Scott Director Ray Utarnachitt Writer Grainne Godfree Writer