Victor Garber Professor Stein, Half of Firestorm Actor Brandon Routh Ray Palmer, Atom Actor Arthur Darvill Rip Hunter 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 Matt Letscher Eobard Thawne, Reverse-Flash Actor Maisie Richardson-Sellers Amaya Jiwe, Vixen Actor Amy Louise Pemberton Gideon Voice Stephen Amell Oliver Queen, Green Arrow Guest Star Neal McDonough Damien Darhk Guest Star John Rubinstein Albert Einstein Guest Star Matthew MacCaull Henry Heywood, Commander Steel Guest Star Kwesi Ameyaw Charles McNider, Dr. Mid-Nite Guest Star Sarah Grey Courtney Whitmore, Stargirl Guest Star Christiaan Westerveld King Louis XIII Guest Star Christina Jastrzembska Mileva Maric Guest Star Rebecca Eady Queen Anne of Austria Guest Star Greg Berlanti Executive Producer, Writer Marc Guggenheim Executive Producer, Writer Andrew Kreisberg Executive Producer Phil Klemmer Executive Producer, Writer Chris Fedak Executive Producer, Writer Sarah Schechter Executive Producer Dermott Downs Director