John O'Quinn (1 episode)

Alexei Andropov

Master Chief Saxin

Intergang Squad Leader

Ram Kady

Brian Andrews

Neils Skellig

Victor Zelko (2 episodes)

Fred

Nikos Papalexopoulous

Ivan

The Man (6 episodes)

Skull Keeper (1 episode)

Caleb (1 episode)

Cain / Able

Bogden (1 episode)

The Mute (3 episodes)

Tristan (3 episodes)

Lord Doom (8 episodes)

Thenn Warg (3 episodes)

Science Officer 0718

Albino (3 episodes)

Albino (voice) (1 episode)

Agent Hawk (1 episode)

Frost Giant Grundroth

Leif Lungren

Luke (10 episodes)

Incubus

Dark Figure

Saurian Belrog

Dancer in Club (uncredited)

Street Artist (1 episode)

Charon