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 Paul Blackthorne Detective Quentin Lance Actor Cynthia Addai-Robinson Amanda Waller Guest Star Caity Lotz Sara Lance , The Canary Guest Star Celina Jade Shado Guest Star Summer Glau Isabel Rochev Guest Star Audrey Marie Anderson Lyla Michaels Guest Star Katrina Law Nyssa al Ghul Guest Star Michael Rowe Floyd Lawton , Deadshot Guest Star John Barrowman Malcolm Merlyn Guest Star Viv Leacock Raven Guest Star Keri Adams Bethany Snow Guest Star Michael Adamthwaite Torque Guest Star David Nykl Anatoly Knyazev Guest Star Greg Berlanti Executive Producer, Writer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer, Writer David Nutter Executive Producer John Behring Director