Cast 18

1. 

   Kenneth Connor

   Gregory Adams

2. 

   Charles Hawtrey

   Michael Bean

3. 

   Leslie Phillips

   Alistair Grigg

4. 

   Joan Sims

   Sarah Allcock

5. 

   Kenneth Williams

   Edwin Milton

6. 

   Hattie Jacques

   Grace Short

7. 

   Rosalind Knight

   Felicity Wheeler

8. 

   Cyril Chamberlain

   Alf Hudson

9. 

   Ted Ray

   William 'Wakie' Wakefield, the Headmaster

10. George Howell

    Billy Haig - Saboteur

11. Diana Beevers

    Penelope 'Penny' Lee - Saboteur

12. Jacqueline Lewis

    Pat Gordon - Saboteur

13. Roy Hines

    Harry Bird - Saboteur

14. 

    Carol White

    Sheila Dale - Saboteur

15. 

    Richard O'Sullivan

    Robin Stevens - Saboteur

16. Lorna Henderson

    Pianiste

17. Diane Langton

    Schoolgirl

18. 

    Francesca Annis

    Schoolgirl (uncredited)

Crew 10