Cast and credits of Thank God It's Doomsday (2005)

Dan Castellaneta
Homer Simpson / Buddhist / Gay Man / Barry / Christian Bookstore Worker / Sideshow Mel / Krusty the Clown / Grampa Simpson (voice)

Julie Kavner
Marge Simpson (voice)

Nancy Cartwright
Bart Simpson / Nelson Muntz / Woman with Children / Kearney (voice)

Yeardley Smith
Lisa Simpson (voice)

Hank Azaria
Barber / Mr. Thompson / Man on Helicopter / Sea Captain / Carl / Moe Szyslak / Chief Wiggum / Comic Book Guy / Angel (voice)

Harry Shearer
Principal Skinner / Barry's Boss / Kent Brockman / Lenny / Ned Flanders / Dr. Hibbert / God (voice)

Pamela Hayden
Shawna the Mistress / Jimbo Jones (voice)

Tress MacNeille
Barber / Helen / Elderly Woman / Science and Technology Woman / 'I can't wait!' / Dolph / Agnes Skinner / Heaven Narrator (voice)

Karl Wiedergott
Additional Voices (voice)

Baha Men
Baha Men (voice)

Los Lobos
Los Lobos (voice)