Grant Gustin Barry Allen, The Flash Actor Candice Patton Iris West Actor Danielle Panabaker Caitlin Snow, Killer Frost Actor Carlos Valdes Cisco Ramon, Vibe Actor Tom Cavanagh Dr. Harrison Wells Actor Jesse L. Martin Detective Joe West Actor Hartley Sawyer Ralph Dibny Actor Danny Trejo Guest Star Sendhil Ramamurthy Ramsey Rosso Guest Star Greg Berlanti Executive Producer Andrew Kreisberg Executive Producer David Nutter Executive Producer Sarah Schechter Executive Producer Menhaj Huda Director Kelly Wheeler Writer Joshua V. Gilbert Writer