Mark Oliver

as The Great Galacto (voice)

as Marco (1 episode)

as King John (26 episodes)

as Newscaster (1 episode)

as First Mate Mullet (voice)

as Batroc (voice) (4 episodes)

as Archibald (voice)

as Pyritor

as Boss

as Monstrox / Book of Monsters (40 episodes)

as Male Newscaster (segment "Dante the Great")

as Dr. Blakk

as King Nereus (voice)

as Miles Dredd (voice) (26 episodes)

as Dr. Blakk (voice) (39 episodes)

as Duke Trentino

as Garmadon / Mystake (voice) (2 episodes), as Garmadon (voice) (57 episodes), as Garmadon / Dr. Julien (voice) (7 episodes), as Garmadon / Police Officer (voice) (1 episode), as Garmadon / Gravis (voice) (2 episodes), as Dr. Julien / Tuk Tuk Passenger (voice) (1 episode), as Garmadon / Injured Cop (voice) (1 episode), as Korgran's Father (voice) (1 episode)

as Michael Corvin (3 episodes)

as Michael Corvin (voice)

as King Darius (1 episode), as Zechariah (1 episode), as Priest 3 (1 episode)

as Garmadon

as Gustave Le Grand (voice) (1 episode)

as Male Journalist

as Cabal Agent (1 episode)