- Corbet Woodall - Newsreader
- Percy Edwards - Voice of the Dodo
- Jo Kendall - The Queen (voice)
- Beryl Reid - Mrs. Desiree Carthorse
- Richard Wattis - TV Show Host
- Erik Chitty - Eye Witness, The Second Judge
- Frank Thornton - Waiter
- Frank Thornton - Master of Ceremonies
- Peter Jones - Minister for Sports
- Freddie Jones - Mr. Sparklipegs
- Roland MacLeod - Robert McKenzie
- Harry H. Corbett - Minister for Health
- Jon Pertwee - Reverend Llewellyn Llewellyn Llewellyn Llewellyn
- Ballard Berkeley - Chairman of the British Olympic Committee
- Patricia Hayes - The Witch Hazel
- David Dimbleby - David Dimbumblum
- Joe Melia - Builder, Estate Agent
- Mel Smith - TV Talk Show Host
- Roy Kinnear - Professor Nuts
- Roy Kinnear - Emperor
- Alfie Bass - Town Planner
- Joan Sims - Delia Capone
- Joan Sims - Matron
- Raymond Baxter - Self
- John Le Mesurier - Uncle Tom
- Tommy Godfrey - The First Judge
- John Junkin - Police Sergeant
- Frank Windsor - Scoutfinder General
- Bill Fraser - Army Sergeant
- June Whitfield - Penelope Fay
- Geoffrey Palmer - School Headmaster
- Jack Douglas - Police Sergeant
- Patrick Troughton - Dr. Petal
- Valerie Leon - The Seductress
- Norman Mitchell - The town cryer
- Vicki Michelle - Nurse
- Stanley Baxter - Tourism Agent, Loch Ness Monster
- Bernard Bresslaw - Zookeeper in Charge of the Monster House
- Reginald Marsh - Minister for Sport
- Bridget Armstrong - Hazel Nuts
- Barry Cryer - voice only
- Barry Cryer - Newsreader (voice)
- Michael Barratt - Newsreader
- Michael Barratt - Punk Newsreader
- Jane Asher - Caroline Kook
- Sheila Steafel - voice only
- Ronnie Brody - Chamberlain
- Kenny Everett - Sir John Peel (uncredited)
- Magnus Magnusson - Magnus Magnesium
- Oliver Gilbert - Attila the Hun
- John Styles - Punch and Judy
- Jim Franklin
Roy Kinnear interpreta a Emperor en la serie.
Capítulo disponible en las siguientes plataformas: