Stephen Amell Oliver Queen Actor Katie Cassidy Laurel Lance Actor Willa Holland Thea Queen Actor Colton Haynes Roy Harper Actor David Ramsey John Diggle Actor Emily Bett Rickards Felicity Smoak Actor Manu Bennett Slade Wilson Actor Susanna Thompson Moira Queen Actor Paul Blackthorne Detective Quentin Lance Actor Sean Maher Mark Scheffer , Shrapnel Guest Star Kevin Alejandro Sebastian Blood Guest Star Dylan Bruce Adam Donner Guest Star Caity Lotz Sara Lance Guest Star Jesse Hutch Officer Daily Guest Star Ana Mercedes Maya Resik Guest Star Dylan Neal Dr. Anthony Ivo Guest Star Keri Adams Bethany Snow Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer Andrew Kreisberg Executive Producer David Nutter Executive Producer Rob Hardy Director Jake Coburn Writer Keto Shimizu Writer