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 Franz Drameh Jefferson "Jax" Jackson, Half of Firestorm Actor Maisie Richardson-Sellers Amaya Jiwe, Vixen Actor Amy Louise Pemberton Gideon Voice Tala Ashe Zari Adrianna Tomaz Actor Neal McDonough Damien Darhk Actor Keiynan Lonsdale Wally West, Kid Flash Actor Billy Zane P.T. Barnum Guest Star Jes Macallan Ava Sharpe Guest Star Adam Tsekhman Gary Green Guest Star Tracy Ifeachor Kuasa 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 Keto Shimizu Writer Grainne Godfree Writer Keith Tancharoen Director