The Simpsons' pooch, Santa's Little Helper, becomes a police dog.
Dan Castellaneta
Homer Simpson / Abe Simpson / Barney Gumble / Krusty (voice)
Julie Kavner
Marge Simpson / Patty Bouvier / Selma Bouvier (voice)
Nancy Cartwright
Bart Simpson / Nelson Muntz / Ralph Wiggum (voice)
Yeardley Smith
Lisa Simpson (voice)
Hank Azaria
Moe Szyslak / Chief Wiggum / Apu / Comic Book Guy / Carl (voice)
Harry Shearer
Ned Flanders / Mr. Burns / Smithers / Skinner / Lenny (voice)
Stephen Hawking
Stephen Hawking (voice)
Rudolph Giuliani
Rudy Giuliani (voice)
Russi Taylor
Martin Prince (voice)
Marcia Wallace
Edna Krabappel (voice)
Karl Wiedergott
Additional Voices (voice)
Tress MacNeille
Voice on Radio / Brandine / Dolph / Shoquelle (voice)
Maurice LaMarche
Harvest Fest Worker (voice)
Pamela Hayden
Jimbo Jones (voice)