(1 episode)

Dr. Vermillion

Hub's Father (voice) (1 episode)

Alistair Clawbottom (voice) (3 episodes)

(voice) (1 episode)

Self (4 episodes)

Red Forman (26 episodes)

Executive Producer (26 episodes)

Dr. Joseph Wanless

David Boies (3 episodes)

Self (archive footage) (uncredited) (1 episode)

Self (1 episode)

Carpenter K. Smith (voice) (6 episodes)

Old Man Miller (3 episodes)

Magnus Hardcastle

Clar (voice) (1 episode)

Tinsley (1 episode)

Ted Tucker (1 episode)

Uncle Dave (6 episodes)

Vise (1 episode)

Sam Peterson (2 episodes)

Sheriff Bob Fuller

Dr. Milton

Angry Old Raisin (voice) (9 episodes)

Vernon Masters (7 episodes)

Father Krang (1 episode)

Leslie Claret (18 episodes)

Gene (voice)

General Nathan (voice) (1 episode)

Henry Langston (21 episodes)

Self (1 episode)

Lieutenant James Gordon (voice) (26 episodes)

Indy CEO (voice)

Geoffrey Shurlock

Gene / Park Ranger #3 (voice) (1 episode)

Gene (voice) (6 episodes)

Mr. Wheelie (voice) (50 episodes)

Shyir Rev (voice) (2 episodes)

Ed Strathmore (1 episode)

H.J. Higgins (13 episodes)

Orin Helgesson

Ben Hayflick (2 episodes)

Don Killbride (10 episodes)

Mercury General (voice) (2 episodes)

Kanjar Ro (voice)

Senator Blaine Mayer (6 episodes)

Dick Clayton (16 episodes)

Self (1 episode)

Dr. Obyedkov (1 episode)

Brett Connors (1 episode)

Justice Henry Greenberg (1 episode)

Nick

Edward Cooper (3 episodes)

Benno

(52 episodes)

Self (1 episode)

William Rutherford

(2 episodes)

Dr. Theodore Rosen

Principal Block (1 episode)

(1 episode)

(1 episode)

Prosecutor (voice) (2 episodes)

(1 episode)

Sec. of Transportation William Easter

Agent Bennett (voice) (1 episode)

Agent Bennet (voice) (26 episodes)

Officer Dick (voice) (3 episodes)

(voice) (1 episode)

Dr. Crumble

Jacob (1 episode)

Red Forman (200 episodes)

General Westmoreland

Otis Hefter

Principal (uncredited)

Tom Cantrell

Col. Emmett Anderson (2 episodes)

Forbus (voice) (1 episode)

Annorax (2 episodes)

Curtis Cunningham

Norm Stoney

Thrax (1 episode)

Stump Sisson

Secretary of Defense Baird

Agent Bill Patterson (1 episode)

Earl Stone

Sheriff Deegan

General Stanley Cooper

Leonard Rosenglass

Julian Thompson

Clarence Boddicker

Patterson (uncredited)

Jack Lord (6 episodes)

Traeger

Cliff Forrester

Dr. Alan Harrison

Clarence Boddicker (archive footage)

Prison Director Poe

Self

Federation President

Vogel's Follower

Elliot Jaffe

Lt. Toomey, Chicago PD

Russ Crane / Lombino

Myron Castleman

Dr. Josef Goebbels (4 episodes)

Professor Flournoy

Mr. Perry

Robert Reynard

Defense Attorney

Griggs

Paul Bosgang (1 episode)

Mr. Sue (8 episodes)

Clarence Boddicker

Spencer Phillips (2 episodes)

Jake Richards

(1 episode)

Arthur McNeil

Captain Warren Jensen

Gilbert

Lieutenant Burton

Carson

Bill Spradley (1 episode)

Mr. Carson (1 episode)

Clarence

Choreographer

Sincoff

Captain Scanlon (6 episodes)

Capt. Frank Scanlon

Sergeant Smith

(1 episode)