- John Hurt
- Forbush
- Hayley Mills
- Tara St. John Luke
- Dudley Sutton
- Starshot
- Tony Britton
- George Dewport
- Thorley Walters
- Mr. Forbush Sr.
- Judy Campbell
- Mrs. Forbush
- Joss Ackland
- Head of Board
- Nicholas Pennell
- Julien
- Avril Angers
- Fanny Hill
- Cyril Luckham
- Professor Tringham
- Sally Geeson
- Jackie
- Brian Oulton
- Food Store Assistant
- Salmaan Peerzada
- Ahaz Khan
- Hugh Moxey
- Lord Cheddar
- Norman Claridge
- Principal
- John Comer
- Police Sergeant
- Geraldine Sherman
- Penny
- Jumoke Debayo
- Traffic Warden
- Lew Luton
- 1st Pilot
- Burnell Tucker
- 2nd Pilot
- Rudy Bond
- 3rd Pilot
- Margaret Lacey
- Auntie
- Marianne Stone
- Policewoman
- Andy Robins
- Barry
- Amanda Steer
- Wendy
- Jack Arrow
- Protester
- Terence Conoley
- Protester
- Madeline Smith
- Unknown (scene cut)
- Guy Standeven
- Protestor
- Joe Wadham
- Police Driver
