Chloë Annett

Character: Self

Chris Barrie

Character: Self

Craig Charles

Character: Self

Danny John-Jules

Character: Self

Robert Llewellyn

Character: Self

Norman Lovett

Character: Self

Paul Jackson

Character: Self

Stephen Hawking

Character: Self

Garry Bushell

Character: Self

Eternal

Character: Self

Easther Bennett

Character: Self (as Eternal)

Vernie Bennett

Character: Self (as Eternal)

Kelle Bryan

Character: Self (as Eternal)

Terry Pratchett

Character: Self

James O'Brien

Character: Self

Patrick Stewart

Character: Self

Noel Edmonds

Character: Self

Andrew Dawson

Character: Self

Tony Lacey

Character: Self

Patrick Moore

Character: Self

Kai Maurer

Character: German

Stephan Grothgar

Character: German

Rupert Bates

Character: Dalek (voice)

Hattie Hayridge

Character: Holly (archive footage)

David Ross

Character: Talkie Toaster (voice, archive footage)