Jonathan Harris

Manny (voice) (archive footage)

The Professor (voice)

Dr. Zachary Smith (archive footage)

Era (voice)

The Cleaner (voice)

Manny (voice)

Self (also archive footage)

Stickley Rickets (voice)

Julian Frey (voice)

Professor Jones (voice)

Miles Warren / The Professor (voice)

(voice)

Phineas Sharp (voice)

Sunflower (voice)

Grumblebee (voice)

Host

Count Blogg (voice)

Granger

Lucifer (voice) (uncredited)

Lucifer

Lucifer (voice)

Oz (uncredited) (voice)

Dr. Cropotkin

The Astrologer