Special Guest Stars Matt Ryan as Dr. Gwyn Davies Matt Letscher as Eobard Thawne / Reverse Flash Guest Stars Timothy Webber as The Proprietor Co Starring Trezzo Mahoro as Hotshot #1 Anthony Timpano as Hotshot #2 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 Nick Zano as Robo Nate Tala Ashe as Robo Zari Lisseth Chavez as Robo Spooner Olivia Swann as Robo Astra Shayan Sobhian as Robo Behrad