Chloë Annett
Self
Chris Barrie
Self
Craig Charles
Self
Danny John-Jules
Self
Robert Llewellyn
Self
Norman Lovett
Self
Stephen Hawking
Self
Terry Pratchett
Self
James O'Brien
Self
Patrick Stewart
Self
Noel Edmonds
Self
Patrick Moore
Self
Rupert Bates
Dalek (voice)
Hattie Hayridge
Holly (archive footage)
David Ross
Talkie Toaster (voice, archive footage)