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 Melissa Benoist Kara Danvers, Supergirl Guest Star Grant Gustin Barry Allen, The Flash Guest Star Caity Lotz Sara Lance, White Canary Guest Star Rick Gonzalez Rene Ramirez, Wild Dog Guest Star John Barrowman Malcolm Merlyn Guest Star Joe Dinicol Rory Regan, Ragman Guest Star Neal McDonough Damien Darhk Guest Star Jamey Sheridan Robert Queen Guest Star Susanna Thompson Moira Queen Guest Star Katie Cassidy Laurel Lance Guest Star Greg Berlanti Executive Producer, Writer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer David Nutter Executive Producer Wendy Mericle Writer James Bamford Director