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 Katrina Law Nyssa al Ghul Guest Star John Barrowman Malcolm Merlyn Guest Star Matt Nable Ra's al Ghul Guest Star Cynthia Addai-Robinson Amanda Waller Guest Star Karl Yune Maseo Yamashiro Guest Star Brandon Nomura Akio Yamashiro Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer David Nutter Executive Producer John Behring Director Wendy Mericle Writer