Graham Chapman / Narrator (voice)
John Cleese / Exploding Don / David Frost (voice)
Terry Jones / Graham's Mother / Biggles / Anatomy Don / Enormous Peter (voice)
Michael Palin / Graham's Father / Interview Don #1 / Hibbern / Queen Mother (voice)
Interview Don #2 / Dr One Across / Pilot / Aleister Crowley / Jose (voice)
Masseuse / Singing Telegram / Stewardess (voice)
David Sherlock (voice)
Oscar Wilde (voice)
(voice)
Uncle Lloyd (voice)
Recording Engineer (voice)
Vomiting Sylvia Krystel (voice)
Seigmund Freud (voice)
Thompson (archive footage) (uncredited)
Self (archive footage) (uncredited)
Self (voice) (uncredited)
Young David Sherlock (voice) (uncredited)