Special Guest Stars Matt Letscher as Eobard Thawne / Reverse Flash Matt Ryan as Dr. Gwyn Davies Guest Stars Timothy Webber as The Proprietor Co Starring Anthony Timpano as Hotshot #2 Trezzo Mahoro as Hotshot #1 Rady Panov as Gavrilo Princip Chris Olson as Hotshot #3 Timothy Daniel Selby as Young Sarajevan Erin Mudry as Sarajevan with Tablet Uncredited Caity Lotz as Robo Sara Jes Macallan as Robo Dr. Sharpe Tala Ashe as Robo Zari Lisseth Chavez as Robo Spooner Olivia Swann as Robo Astra Nick Zano as Robo Nate Shayan Sobhian as Robo Behrad