Grant Gustin Barry Allen, The Flash Actor Candice Patton Iris West Actor Rick Cosnett Eddie Thawne 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 Stephen Amell Oliver Queen, The Arrow Guest Star Emily Bett Rickards Felicity Smoak Guest Star David Ramsay John Diggle Guest Star Patrick Sabongui Captain David Singh Guest Star Paul Anthony Roy G. Bivolo, Rainbow Raider Guest Star Robbie Amell Ronnie Raymond Guest Star Greg Berlanti Executive Producer, Writer Andrew Kreisberg Executive Producer, Writer David Nutter Executive Producer Sarah Schechter Executive Producer Glen Winter Director Ben Sokolowski Writer Brooke Eikmeier Writer