Stephen Amell Oliver Queen, Green Arrow Actor David Ramsey John Diggle, Spartan Actor Willa Holland Thea Queen Actor Emily Bett Rickards Felicity Smoak Actor Paul Blackthorne Quentin Lance Actor Echo Kellum Curtis Holt, Mr. Terrific Actor Josh Segarra Adrian Chase, Prometheus Actor John Barrowman Malcolm Merlyn Guest Star Manu Bennett Slade Wilson Guest Star Katrina Law Nyssa al Ghul Guest Star Nick Tarabay Digger Harkness Guest Star Katie Cassidy Black Siren Guest Star Madison McLaughlin Evelyn Sharp Guest Star Lexa Doig Talia al Ghul Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer David Nutter Executive Producer Jesse Warn Director Wendy Mericle Writer