- Johnny Ball - No. 1 - Self
- Ellen Hughes - No. 1 - Duncan's Sister
- Duncan Wisbey - No. 1 - Divine Dating (voice)
- John Line - No. 1 - God
- India Lloyd-Evans - No. 1 - Party Guest
- Michael Douglas - No. 3 - Shoe Expert
- Steve Ryde - No. 4 - Accountant on Bus
- Melvin Odoom - No. 4 - Agent 1
- Lee Barnett - No. 4 - Agent 2
- Dave Chapman - No. 4 - Agent 3 / Guppy (voice)
- Holly Lucas - No. 4 - Girl on Platform
- Ben Bishop - No. 5 - Supermarket Security
- Louis Greatorex - No. 5 - Giles
- Max Jones - No. 5 - Kid at Camp
- Chloe Richardson - No. 5 - Kid at Camp
- Molly Windsor - No. 5 - Kid at Camp
- Michael Sheen - No. 5 - Detective Burnam
- Chris Gascoyne - No. 5 - Detective Lister
- Gail Renard - No. 5 - Award Guest
- Iain Lauchlan - No. 5 - Award Guest
- Nicholas Asbury - No. 5 - Shakespeare
- Ian Kirkby - Duncan World - Tour Guide
- Mark Benton - Duncan World - Rollercoaster Alan
- Brendan O'Hea - Duncan World - Ted
- Harry Buckley - Duncan World - Boy on Tram
- Lauren Carey - Duncan World Guest
-
Julian Kemp
- Alain de Botton
-
Michael Kelk, Marion Pilowsky, David Willing
- Kevin Brazier
- Ben Brazier
Capítulo disponible en las siguientes plataformas:
