Guillermo del Toro Creator, Executive Producer Colin O'Donoghue Douxie Voice Emile Hirsch Jim Voice Lexi Medrano Claire Voice Charlie Saxton Toby Voice Steven Yeun Steve Voice David Bradley Merlin Voice Lena Headey Morgana Voice Fred Tatasciore Aaarrrgghh!!! Voice Clancy Brown Gunmar Voice Diego Luna Krel Voice Mark Hamill Dictatious Voice Kelsey Grammer Blinky Voice Alfred Molina Archie Voice Stephanie Beatriz Calista Voice James Faulkner King Arthur Voice John Rhys-Davies Galahad Voice Marc Guggenheim Executive Producer Chad Hammes Executive Producer