Stephen Amell Oliver Queen, Green Arrow Actor David Ramsey John Diggle, Spartan Actor Willa Holland Thea Queen Actor Emily Bett Rickards Felicity Smoak Actor Echo Kellum Curtis Holt, Mr. Terrific Actor Katie Cassidy Laurel Lance, Black Siren Actor Paul Blackthorne Quentin Lance Actor Juliana Harkavy Dinah Drake, Black Canary Actor Rick Gonzalez Rene Ramirez, Wild Dog Actor Manu Bennett Slade Wilson, Deathstroke Guest Star Liam Hall Joseph Wilson Guest Star William Franklyn-Miller Young Joseph Wilson Guest Star Sydelle Noel Samanda Watson Guest Star Kris Holden-Ried Nylander Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer Andrew Kreisberg Executive Producer David Nutter Executive Producer Joel Novoa Director Ben Sokolowski Writer Spiro Skentzos Writer