King Arthur / Voice of God / Middle Head / Hiccoughing Guard

Second Swallow-Savvy Guard / The Black Knight / Peasant 3 / Sir Launcelot the Brave / Taunting French Guard / Tim the Enchanter

Dead Collector / Peasant 1 / Sir Robin the Not-Quite-So-Brave-as-Sir Launcelot / First Swamp Castle Guard / Concorde / Roger the Shrubber / Brother Maynard

Patsy / Green Knight / Old Man from Scene 24 (Bridgekeeper) / Sir Bors / Animator / Gorilla Hand

Dennis's Mother / Sir Bedevere / Left Head / Prince Herbert / Voice of Cartoon Scribe

First Swallow-Savvy Guard / Dennis / Peasant 2 / Right Head / Sir Galahad the Pure / Narrator / King of Swamp Castle / Brother Maynard's Brother / Leader of The Knights Who Say NI!

The Witch

Zoot / Dingo

First Monk / Singing Minstrel / Page Crushed by the Rabbit / Peasant #4

Old Crone

Dead Body / Historian Frank

Historian's Wife