Grant Gustin Barry Allen, The Flash Actor Candice Patton Iris West Actor Danielle Panabaker Caitlin Snow Actor Carlos Valdes Cisco Ramon, Vibe Actor Tom Cavanagh Dr. Harrison Wells Actor Jesse L. Martin Detective Joe West Actor Keiynan Lonsdale Wally West, Kid Flash Actor Tom Felton Julian Albert Actor Violett Beane Jesse Wells , Jesse Quick Guest Star Jessica Camacho Gypsy Guest Star David Sobolov Grodd Voice Keith David Solovar Voice Greg Berlanti Executive Producer Andrew Kreisberg Executive Producer, Writer David Nutter Executive Producer Sarah Schechter Executive Producer Dermott Downs Director Aaron Helbing Writer David Kob Writer