Genndy Tartakovsky Creator, Executive Producer, Writer, Director Ron Bottitta Lord Edward Fairfax , Reporter #2, Patient #2, Train Porter , Conductor Voice Victor Alli Adult Seng Voice Jeremy Crutchley Merlin , Lawrence, Gwylfred, Passenger #1, Doctor Voice Jacob Dudman Ancient Eygpt Edred, Original Edred , Tillac, Klink, Shultz Voice Brian George Darvish Voice Grey DeLisle Mysterious Woman, Little Girl, Woman 1 , Original Melinda , Nurse #2, Clarice Leydoux , June Way , Mary, Necromancer , Andaen Voice Peta Johnson Morgan Voice Alain Uy Ancient Egypt Seng, Man 3 Voice Rosalind Ayres Lady Katherine Fairfax , Nurse #1 , Patient #1 , Agatha Voice Sam Register Executive Producer