Victor Garber Professor Stein, Half of Firestorm Actor Brandon Routh Ray Palmer, Atom Actor Dominic Purcell Mick Rory, Heat Wave Actor Nick Zano Dr. Nate Heywood, Citizen Steel Actor Caity Lotz Sara Lance, White Canary Actor Maisie Richardson-Sellers Amaya Jiwe, Vixen Actor Amy Louise Pemberton Gideon Voice Tala Ashe Zari Tomaz Actor Neal McDonough Damien Darhk Actor Keiynan Lonsdale Wally West, Kid Flash Actor Matt Ryan John Constantine Guest Star Courtney Ford Nora Darhk Guest Star Jes Macallan Ava Sharpe Guest Star John Noble Mallus Guest Voice Adam Tsekhman Gary Green Guest Star Violett Beane Jesse Wells Guest Star Matthew MacCaull Henry Heywood Guest Star Greg Berlanti Executive Producer Marc Guggenheim Executive Producer Andrew Kreisberg Executive Producer Phil Klemmer Executive Producer Chris Fedak Executive Producer Sarah Schechter Executive Producer April Mullen Director Grainne Godfree Writer Morgan Faust Writer