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 Sea Shimooka Green Arrow Guest Star Audrey Marie Anderson Lyla Guest Star Eliza Faria Zoe Guest Star Vinnie Jones Danny 'Brick' Brickwell Guest Star Jack Moore William Guest Star Jeremy Davies John Deegan Guest Star Melissa Benoist Supergirl Guest Star Kelly Hu China White Guest Star Michael Jai White Ben Turner Guest Star Michael Jonsson Kodiak Guest Star Liam Hall Kane Wolfman Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer David Nutter Executive Producer James Bamford Director Gordon Verheul Director Kristin Windell Director Beth Schwartz Writer Rebecca Bellotto Writer Emilio Ortega Aldrich Writer Benjamin Raab Writer Onalee Hunter Hughes Writer Jill Blankenship Writer Oscar Balderrama Writer Deric A. Hughes Writer Tonya Kong Writer Sarah Tarkhoff Writer Sarah Tarkoff Writer Elizabeth Kim Writer