Homer Simpson / Itchy / Barney / Abe Simpson / Stage Manager / Krusty the Clown / Mayor Quimby / Mayor's Aide / Multi-Eyed Squirrel / Panicky Man / Sideshow Mel / Mr. Teeny / EPA Official / Kissing Cop / Bear / Boy on Phone / NSA Worker / Officer / Santa's Little Helper / Squeaky-Voiced Teen (voice)

Dan Castellaneta

Acting

Marge Simpson / Selma Bouvier / Patty Bouvier (voice)

Julie Kavner

Acting

Bart Simpson / Maggie Simpson / Ralph / Nelson / Todd Flanders / TV Daughter / Woman on Phone (voice)

Nancy Cartwright

Acting

Lisa Simpson (voice)

Yeardley Smith

Acting

Professor Frink / Comic Book Guy / Moe / Chief Wiggum / Lou / Carl / Cletus / Bumblebee Man / Male EPA Worker / Dome Depot Announcer / Kissing Cop / Carnival Barker / Counter Man / Apu / Drederick Tatum / Sea Captain / EPA Passenger / Robot / Dr. Nick / Wise Guy (voice)

Hank Azaria

Acting

Scratchy / Mr. Burns / Rev. Lovejoy / Ned Flanders / Lenny / Skull / President Arnold Schwarzenegger / Kent Brockman / Principal Skinner / Dr. Hibbert / Smithers / Toll Booth Man / Guard / Otto / Kang (voice)

Harry Shearer

Acting

Milhouse Van Houten / Jimbo Jones / Rod Flanders (voice)

Pamela Hayden

Acting

Sweet Old Lady / Colin / Mrs. Skinner / Nelson's Mother / Pig / Cat Lady / Female EPA Worker / G.P.S. Woman / Cookie Kwan / Lindsey Naegle / TV Son / Medicine Woman / Girl on Phone (voice)

Tress MacNeille

Acting

Russ Cargill (voice)

Albert Brooks

Acting

Man / EPA Driver (voice)

Karl Wiedergott

Acting

Edna Krabappel (voice)

Marcia Wallace

Acting

Martin Prince (voice)

Russi Taylor

Acting

Helen Lovejoy (voice)

Maggie Roswell

Acting

TV Dad (voice)

Phil Rosenthal

Writing

Billie Joe Armstrong (voice)

Billie Joe Armstrong

Acting

Mike Dirnt (voice)

Mike Dirnt

Acting

Tre Cool (voice)

Tré Cool

Acting

Fat Tony (voice)

Joe Mantegna

Acting

Tom Hanks (voice)

Tom Hanks

Acting