Ira

Mayor

Gerald (1 episode)

Self - Host (8 episodes)

Self - Guest (1 episode)

God

Self - Actor and Best-Selling Author (1 episode)

Hector the Teen Driver / Self (1 episode)

Self (1 episode)

Dr. Eric Nostrum (1 episode)

Self (1 episode)

Self - Guest (3 episodes)

Self - Guest (2 episodes)

Self (3 episodes)

Self (1 episode)

Wilhand Trickfoot (voice) (2 episodes)

Tatty (10 episodes)

Smiley (voice)

Self (1 episode)

Uncle Al

Santa (voice) (1 episode)

Dr. Brenner

Self (2 episodes)

Alex's Dad (voice) (1 episode)

Bobby

Captain Cool (voice) (1 episode)

Melvin (voice) (1 episode)

Uncle Joe

Boris (voice) (2 episodes)

Boris / The Count / Mr. Friend Doll (voice) (1 episode)

Self - Actor (8 episodes)

Fritz (voice) (20 episodes)

Bailiff (voice) (1 episode)

Jepson (voice)

Dr. Cotton

Wizard Longbeard (voice) (1 episode)

Keith (voice)

Yeti (voice) (1 episode)

Arthur Herbert Fonzarelli (archive footage)

Self (1 episode)

Executive Producer (13 episodes)

Sy Mittleman (2 episodes)

(1 episode)

Self (2 episodes)

Self - Guest (1 episode)

Self (1 episode)

Self - Panelist (1 episode)

Child Protection Services Agent (voice) (1 episode)

Self (1 episode)

Leo Wasserman (1 episode)

Self (2 episodes)

Self (1 episode)

Gene Cousineau (32 episodes)

Grandpa Bill (voice)

Uncle King Julien (voice) (6 episodes)

Testimonial

Mr. Rock

Henry Winkler

Self (12 episodes)

Jeff Tentacles (1 episode)

Sharkface (2 episodes)

Ed Koch

Flip (1 episode)

Nacho Cheese (voice) (1 episode)

Nerd's Dad (voice)

Mall Santa (voice) (1 episode)

Zenas Fisk Wilber (1 episode)

Henry Winkler (voice) (1 episode)

Stanley Warner

Leonard Rascal (1 episode)

Uncle King Julien (voice) (11 episodes)

The Snowman (voice) (2 episodes)

Self (1 episode)

Self - Guest (3 episodes)

Mr. Rock (39 episodes)

Self (1 episode)

Dr. Saperstein (6 episodes)

Senator Faxler (1 episode)

Self (1 episode)

Nathaniel Zib (voice)

Nerd's Dad / Jason Bourne / Christmas Tree (voice)

John Adams (voice) (1 episode)

Christmas Tree / Jason Bourne / Nerd's Father (voice) (1 episode)

Marty Streb

Marty Alexander (1 episode)

Ambush Bug (voice) (1 episode)

Nathaniel Zib (voice)

Narrator

Bob Weatherbee

Nathaniel Zib (voice)

Principal (voice) (1 episode)

Nathaniel Zib (voice)

Professor Nathaniel Zib (17 episodes)

Burton

Sy Mittleman (81 episodes)

Eddie R. Lawson (25 episodes)

Self (1 episode)

(1 episode)

(13 episodes)

Self (3 episodes)

Personal Budget Expert (1 episode)

Uncle Ralph

Judge Newman

Roger Bloom (3 episodes)

Self (1 episode)

Limousine Passenger

Happy Herb

Self (uncredited)

Self (2 episodes)

Self - Guest (1 episode)

Cliff Lawton

Ted

Self (1 episode)

Narrator (voice) (1 episode)

Fullerton

Johnny Bernstein

Sy

Dr. Maniac (voice) (2 episodes)

Dr. Stewart Barnes (22 episodes)

Dr. Jack Slocum (2 episodes)

Henry Winkler (voice) (1 episode)

Self - Guest (2 episodes)

Self (4 episodes)

Self - Audience Member (uncredited) (1 episode)

Lester Martin (3 episodes)

Self (2 episodes)

(2 episodes)

Barry Zuckerkorn (32 episodes)

Norville (voice) (40 episodes)

Self (4 episodes)

(1 episode)

Stanley Yelnats III

Executive Producer (1 episode)

Creator

Sal Monella (voice) (1 episode)

Executive Producer

Executive Producer (360 episodes)

Edwin Todd (1 episode)

Mr. Newsome (1 episode)

Self - Presenter (1 episode)

Henry Winkler

Self - Guest (2 episodes)

Self (1 episode)

Walter Dunleavy (1 episode)

Director (2 episodes)

Chef Ray

Larry Steinberg

Ramrod (voice) (1 episode)

Dr. Henry Olson (3 episodes)

Self (1 episode)

Fergus McGarrity (1 episode)

Producer (65 episodes)

Edward Crow

Coach Klein

John Quinn

The Scary Monster (voice) (1 episode)

Director (1 episode)

Skip Fine

Jack Potter

(44 episodes)

Producer (44 episodes)

Principal Arthur Himbry (uncredited)

Self (1 episode)

Director (1 episode)

Director (1 episode)

Steven Moore

Producer

Dad

Executive Producer

Executive Producer

Monty Richardson (13 episodes)

Tony

Director

Self (1 episode)

(112 episodes)

Marty Klein

Carl Conway (voice)

Executive Producer

Director

Director

Producer (11 episodes)

Producer

Carl Conway (voice)

Wilton Newberry (uncredited) (1 episode)

Executive Producer (139 episodes)

Executive Producer

Executive Producer

Director

Self (1 episode)

Executive Producer

Executive Producer

Director (1 episode)

The Fonz (voice) (1 episode)

Chuck Lumley

Fonzie (24 episodes)

Benedict Slade

Self (1 episode)

Arthur "The Fonz" Fonzarelli (archive footage)

Self (1 episode)

Fonzie (1 episode)

Self (1 episode)

Andy Schmidt

Jack Dunne

Self (1 episode)

(2 episodes)

Bob Kline

Self (2 episodes)

Butchey Weinstein

Mannie

Miles Lascoe (1 episode)

Arthur Fonzarelli (252 episodes)

Auditioning Actor (uncredited)

Steve Waldman (1 episode)

Himself (34 episodes)