Special Guest Stars Victor Garber as Dr. Martin Stein / Firestorm Guest Stars John Wesley Shipp as Dr. Henry Allen Robbie Amell as Ronald "Ronnie" Raymond / Firestorm Andy Mientus as Hartley Rathaway Melise as Linda Park Britne Oldford as Shawna Baez Micah Joe Parker as Clay Co Starring Crystal Mudry as Woman Doug Chapman as City Worker #1 Scott McNeil as Julius Tristan Shire as Bartender J. Douglas Stewart as Fire Chief Jerry Trimble as Marcus Stockheimer Will E. McDonald as Truck Guard #1 Mathew Yanagiya as Man Theo Wiersma as Karaoke Bar Patron Fraser Aitcheson as City Worker #2
