Stephen Amell Oliver Queen Actor Katie Cassidy Laurel Lance Actor Willa Holland Thea Queen Actor Colton Haynes Roy Harper Actor David Ramsey John Diggle Actor Emily Bett Rickards Felicity Smoak Actor Manu Bennett Slade Wilson Actor Susanna Thompson Moira Queen Actor Paul Blackthorne Detective Quentin Lance Actor Summer Glau Isabel Rochev Guest Star Celina Jade Shado Guest Star Colin Salmon Walter Steele Guest Star Dylan Bruce Adam Donner Guest Star Adrian Holmes Lt. Frank Pike Guest Star Derek Hamilton Aglin Guest Star Giacomo Baessato Colton Guest Star Keri Adams Bethany Snow Guest Star Jason Griffith Deveau Guest Star Caity Lotz The Canary Guest Star Greg Berlanti Executive Producer, Writer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer, Writer David Nutter Executive Producer John Behring Director