- Simon Bell
- James Henry Trotter
- Anna Quayle
- Aunt Spiker
- Ann Beach
- Aunt Sponge
- Arthur Hewlett
- Old man
- Andrew Sachs
- Interviewer / 1st Naval Officer / Security Chief
- Thorley Walters
- Grasshopper
- Pat Coombs
- Spider
- Kate Lock
- Ladybird
- Bernard Cribbins
- Centipede
- Hugh Lloyd
- Earthworm
- Christopher Owen
- Silkworm / 2nd Naval Officer
- Jo Kendall
- Glow-Worm / American Woman
- James Berwick
- American General / Ship's Captain
- Blain Fairman
- 1st American / 4th Naval Officer
- Bernard Taylor
- 2nd American / 3rd Naval Officer
- Weston Gavin
- Newscaster
- Gary McDermott
- Police Chief
- Robert MacLeod
- Fire Chief
