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 Greg Berlanti Executive Producer, Writer Julie Plec Executive Producer Phil Klemmer Executive Producer, Writer Danny Cannon Executive Producer Thom Beers Executive Producer Craig Cegielski Executive Producer Rob Bailey Director Alex Katsnelson Writer