Stephen Amell Oliver Queen Actor Katie Cassidy Laurel Lance Actor David Ramsey John Diggle Actor Willa Holland Thea Queen Actor Emily Bett Rickards Felicity Smoak Actor John Barrowman Malcolm Merlyn Actor Paul Blackthorne Captain Quentin Lance Actor Neal McDonough Guest Star Grant Gustin Barry Allen , The Flash Guest Star Danielle Panabaker Caitlin Snow Guest Star Carlos Valdes Cisco Ramon Guest Star Ciara Renée Kendra Saunders , Hawkgirl Guest Star Casper Crump Vandal Savage Guest Star Falk Hentschel Carter Hall , Hawkman Guest Star Anna Hopkins Samantha Clayton Guest Star Peter Francis James Dr. Aldus Boardman Guest Star Jack Moore William Guest Star Michael Tiernan Rameses II Guest Star Greg Berlanti Executive Producer, Writer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer David Nutter Executive Producer Thor Freudenthal Director Brian Ford Sullivan Writer