- Charles Gray
- Narrator
- Bruno Elrington
- The Leader (segment "The Stone Age")
- June Palmer
- The Girlfriend (segment "The Stone Age")
- Maj-Britt Mannson
- The Secretary (segment "The Stone Age")
- Julian Orchard
- The Pharaoh (segment "The Egyptians")
- Carol Hamilton
- Queen Nefertiti (segment "The Egyptians") / Zero 2 (segment "The Future")
- Max Bacon
- Yossel (segment "The Egyptians")
- Patricia Kluge
- The Dancer (segment "The Egyptians")
- Suzan Long
- Lotus (segment "The Chinese")
- S'Zeto
- The Gardener (segment "The Chinese")
- Dawn Grayson
- Her Ladyship (segment "The Cavaliers")
- Maya Zell
- The Baroness (segment "The Cavaliers") / Zero 1 (segment "The Future")
- David London
- Jossop (segment "The Cavaliers") / The Psycho-analyst's Voice
- Sue Bond
- Serving Girl (segment "The Cavaliers")
- Howard Nelson
- Sir Rupert (segment "The Cavaliers")
- William Hurndell
- Sir Gregory (segment "The Cavaliers")
- Steve Patterson
- Horseman (segment "The Cavaliers")
- Rusty Hood
- Swordsman (segment "The Cavaliers")
- Max Wall
- Roundhead Leader (segment "The Cavaliers")
- Rita Webb
- Brunhilda (segment "The Theatre")
- Stuart Samuels
- Theatre Manager (segment "The Theatre")
- Dawn Williams
- The Girl (segment "The Theatre")
- Terry Duggan
- The Policeman (segment "The Theatre")
- Cardew Robinson
- The Magistrate (segment "The Theatre")
- Oliver MacGreevy
- Hargreaves (segment "The Old Dark House")
- Karen Klein
- The Girl (segment "The Old Dark House")
- Rena Brown
- The Leader (segment "The Future")
- Monique Devereaux
- Girl in Command (segment "The Future")
- Mona Brown
- Nurse (segment "Harley St.")
- Annette Johnson
- Nurse (segment "Harley St.")
- Toni Harrison Marks
- The Psycho-analyst
- George Harrison Marks
- The Cave Artist / Egyptian Slave / The Mandarin / The Greek Philosopher / Harrison de Chandelier / The Great Marko / The Professor / The Poet (as Harrison Marks)
- Maria Frost
- Photographer's Model
- Josephine Harrison Marks
- Baby
- Pat Schaefer
- (uncredited)
- Li Wing
- (uncredited)
