Stephen Amell Oliver Queen, Green Arrow Actor David Ramsey John Diggle, Spartan Actor Emily Bett Rickards Felicity SmoakOverwatch Actor Echo Kellum Curtis Holt, Mister Terrific Actor Rick Gonzalez Rene Ramirez, Wild Dog Actor Juliana Harkavy Dinah Drake, Black Canary Actor Katie Cassidy Laurel Lance, Black Siren Actor Colton Haynes Roy Harper, Arsenal Actor Kirk Acevedo Ricardo Diaz Actor Vinnie Jones Danny 'Brick' Brickwell Guest Star Jack Moore William Guest Star Michael Jai White Ben Turner Guest Star Michael Jonsson Kodiak Guest Star Keri Adams Bethany Snow Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer Andrew Kreisberg Executive Producer David Nutter Executive Producer James Bamford Director Beth Schwartz Writer Oscar Balderrama Writer