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 Colton Haynes Roy Harper Actor John Barrowman Malcolm Merlyn Actor Paul Blackthorne Captain Quentin Lance Actor Peter Stormare Werner Zytle , Count Vertigo Guest Star Brandon Routh Ray Palmer Guest Star Grant Gustin Barry Allen Guest Star Caity Lotz Sara Lance , The Canary Guest Star Audrey Marie Anderson Lyla Michaels Guest Star Cynthia Addai-Robinson Amanda Waller Guest Star Karl Yune Maseo Yamashiro Guest Star Rila Fukushima Tatsu Yamashiro Guest Star Primo Allon Greg Osborne Guest Star Nickolas Baric Vincent Steelgrave Guest Star Michael Daingerfield Ned Foster Guest Star Richard Keats Dr. Lockhart Guest Star Brad Kelly Nico Guest Star Ken Lawson Talking Head Guest Star Brandon Nomura Akio Yamashiro Guest Star Greg Berlanti Executive Producer, Writer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer, Writer David Nutter Executive Producer Glen Winter Director Jake Coburn Writer