- James Corden - Bran - Thunderdell's Son
- JJ Feild - Young Jack
- Jonathan Hyde - Dussan
- Anton Lesser - Vidas Merlinis
- Julia McKenzie - Jack's Mum
- Clare Angelini Heather - Wedding Guest (uncredited)
- Nicholas Beveney - Cernos
- Roger Blake - Giant Thor
- Mel Cobb - Journalist
- Frank Baker - Forensic Doctor
- Josh Cole - Operator #1
- Richard Cubison - Curious Patron
- Leo Dolan - Construction Foreman
- Tom Ellis - Bigger Boy #1
- Oliver Ford Davies - Dr. Newman
- Jerry Harte - Board Member
- Richard Huw - Jack's Father
- Rosalind Knight - Hag Woman
- Joseph Long - Antonio
- Adam Fogerty - Lead Warrior
- Marc Goodhall - Cavern Guard
- Andrew Grainger - Armed Policeman
- Peter Guinness - Hall Cryer
- Sam Halpenny - Taxi Driver
- Edward Highmore - Playground Dad
- Freddie Highmore - Playground Son
- Lisa Kay - Security Woman
- Vincent Marzello - Sprague
- Roger Morlidge - Construction Worker #2
- Carl Pizzie - Operator #2
- David J. Nicholls - Ragnar
- Iain Rogerson - Guard
- Lynda Rooke - Hostess
- Cyril Shaps - Bent Little Man
- Rachel Shelley - Brunette
- Alisdair Simpson - Paramedic
- Jason Thorpe - Maitre D'
- Brian Henson - Galaga (voice)
- Glen Davies - Construction Worker #1
- Brian Henson
- James V. Hart
- Bill Barretta
- Martin G. Baker
Freddie Highmore hace el papel de Playground Son.
Bill Barretta interpreta a Thunderdell en la serie.
Rosalind Knight hace el papel de Hag Woman.
Adam Fogerty interpreta a Lead Warrior en la serie.
Matthew Modine interpreta a Jack Robinson en la serie.
Vanessa Redgrave interpreta a Countess Wilhelmina en la serie.
Mia Sara hace el papel de Ondine.
Daryl Hannah interpreta a Thespee en la serie.
Jon Voight interpreta a Siggy en la serie.
Richard Attenborough hace el papel de Magog.
Capítulo disponible en las siguientes plataformas:
