Stephen Amell Oliver Queen, Green Arrow Actor David Ramsey John Diggle, Spartan Actor Emily Bett Rickards Felicity Smoak Actor Katie Cassidy Laurel Lance, Black Siren Actor Paul Blackthorne Quentin Lance Actor Echo Kellum Curtis Holt, Mr. Terrific Actor Juliana Harkavy Dinah Drake, Black Canary Actor Michael Emerson Cayden James Guest Star Johann Urb Vince Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer Andrew Kreisberg Executive Producer David Nutter Executive Producer Ben Sokolowski Writer Emilio Ortega Aldrich Writer James Bamford Director