Cornelius (voice) (104 episodes)

Burnett

Angelo's Old Priest

Vascily Popov (3 episodes)

James Kilworth

Mr. Collie (voice)

Mr. Groundhog (voice) (4 episodes)

Abbot Mortimer (voice)

Dr. Thomas Welch (1 episode)

Abbott Mortimer (voice) (39 episodes)

Cornelius

Sir Charles Ferguson

Officer Pidgeon (voice) (13 episodes)

Charles Ferguson

Horace Talbott

Tim O'Malley (1 episode)

Fridolf (13 episodes)

Father Flannigan

Mr. Correander (voice) (26 episodes)

Angus Fergusson

Ralph Holtz

Ralph Holtz

Senator Danver

Mike West (1 episode)

Clyde

Captain

Dave

Additional Voices (voice) (12 episodes)

Bill Bottles / Additional Voices (voice) (1 episode)

Sir William Johnson

Cornelius (voice) (65 episodes)

Jack Marshak (72 episodes)

Dimetro (voice) (65 episodes)

Flour Merchant (1 episode)

Marchand de farine

(1 episode)

Sylvester Spearfield

Great Wishing Star (voice)

(1 episode)

Mon Julpa (voice) (5 episodes)

No Heart (voice) (98 episodes)

Alderman

Alderman (1 episode)

Chief Charlie McInnes

Col. Douglas

Toad (voice)

King

Dr. McCall

John Sheardon

Dr. Borodinov

Santa Claus (voice)

Marcus Boggs

Dr. Vic Walker

Nathaniel Brewster

Pa Spademinder (voice)

Ed Thompson (2 episodes)

Heisenberg (3 episodes)

General Frederick Dobson Middleton

MacKenzie

Dr. Hardy

B.L. Zebub (voice)

King Caroll

Mayor (voice)

Gellor

Lyle Bishop

Lawyer

Johann Robinson (26 episodes)

Donald Smith (7 episodes)

Capt. Williams

The Colonel

Emery Prometer

Gilbert (2 episodes)

Police officer / Director / Mysterio (voice) (uncredited) (1 episode)

Will Scarlet / Infinata / Baron Blank (voice) (63 episodes)

Thor (Dr. Donald Blake) (voice) (195 episodes)

Bob Roberts (1 episode)

McCrea (1 episode)

Jess Adams (1 episode)

Sheriff Peterson (1 episode)

Mr. Travers (1 episode)

Major Duffy (1 episode)

Mort Bailey (1 episode)

Major Conn (1 episode)

(1 episode)

(3 episodes)