Stephen Amell Oliver Queen, Green Arrow Actor David Ramsey John Diggle, Spartan Actor Emily Bett Rickards Felicity Smoak, Overwatch 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 Sea Shimooka Emiko Queen Actor Rila Fukushima Tatsu Guest Star LaMonica Garrett the Monitor Guest Star Joseph David Jones Connor Guest Star Charlie Barnett Connor's brother Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer Andrew Kreisberg Executive Producer David Nutter Executive Producer Antonio Negret Director Jill Blankenship Writer Sarah Tarkoff Writer James Bamford Director