The Earth Day Special

Bette Midler

Mother Earth

Michael Keaton

Charles McIntyre

Morgan Freeman

Walter Samson

Martin Short

Nathan Thurm

Geena Davis

Kim

Jane Fonda

Hellen

Rhea Perlman

Paula

Danny DeVito

Vic

Dan Aykroyd

Vic's Buddy

Chevy Chase

Vic's Buddy

Rick Moranis

Vic's Buddy

Jack Lemmon

Coach Stewart

Kevin Costner

Bartender

James Brolin

Doctor

Dana Delany

Doctor

Edward James Olmos

Hospital Director

Dustin Hoffman

Every Lawyer

Robin Williams

Everyman

Meryl Streep

Concerned Citizen

Dennis Miller

Weekend Update Anchor

Candice Bergen

Murphy Brown

Harold Ramis

Elon Spengler

Christopher Lloyd

Dr. Emmett L. Brown

Neil Patrick Harris

Doogie Howser M.D.

Rodney Dangerfield

Dr. Vinny Boombatz

Ted Danson

Sam Malone

Kirstie Alley

Rebecca Howe

Woody Harrelson

Woody Boyd

George Wendt

Norm Peterson

John Ratzenberger

Cliff Clavin

Kelsey Grammer

Dr. Frasier Crane

Bill Cosby

Dr. Cliff Huxtable

Phylicia Rashād

Clair Huxtable

Lisa Bonet

Denise Huxtable

Malcolm-Jamal Warner

Theo Huxtable

Tempestt Bledsoe

Vanessa Huxtable

Keshia Knight Pulliam

Rudy Huxtable

Raven-Symoné

Olivia Kendall

Will Smith

Fresh Prince

Bea Arthur

Dorothy Zbornak

Betty White

Rose Nylund

Rue McClanahan

Blanche Devereaux

Estelle Getty

Sophia Petrillo

Ed O'Neill

Al Bundy

Katey Sagal

Peggy Bundy

Christina Applegate

Kelly Bundy

David Faustino

Bud Bundy

Amanda Bearse

Marcy D'Arcy

Downtown Julie Brown

Self

Christopher Reid

Kid [Kid 'N Play]

Christopher Martin

Play [Kid 'N Play]

Jeff Bergman

Bugs Bunny / Porky Pig / Tweety (voice)

Jim Henson

Kermit the Frog (voice)

Jerry Nelson

Robin the Frog (voice)

Dave Goelz

Old Frog (voice)

Richard Hunt

Crocodile (voice)

David Rudman

Lizard (voice)

Kevin Clash

Additional Muppets (voice)

Steve Whitmire

Additional Muppets (voice)

Rick Ducommun

Guard

Mayim Bialik

Self

Michael Douglas

Self

Heavy D

Self

Ice-T

Self

Magic Johnson

Self

Quincy Jones

Self

Melanie Mayron

Self

Queen Latifah

Self

Carl Sagan

Self

Barbra Streisand

Self

Tone Loc

Self

Alex Trebek

Self

Jonathan Brandis

Self

Dan Gauthier

Self

Edan Gross

Self

Dom Irrera

Self

Robert Wuhl

Self

Peter Horton

Self (uncredited)

Bruce Weitz

Self (uncredited)

Don Pardo

Weekend Update Announcer (voice) (uncredited)