- Unknown:
- Derek Birch
- Play By:
- C. E. Webber
- Novel By:
- Michael Gilbert
- Production By:
- Frederick Bradnum
- Wilfred Wetherall, headmaster of a secondary school:
- Derek Birch
- Alastair Todd, a journalist:
- Peter Howell
- Alice Wetherall Wilfred's wife:
- Patricia Hilliard
- Luigi, a restaurateur:
- Jeffrey Segal
- Peggy Donovan Wilfred's secretary sister of Patsy.:
- Judy Tatham
- Patsy Donovan, a Police Sergeant:
- John Welch
- Crowdy, a railwayman:
- Frank Atkinson
- Prince, a one-eyed spiv:
- Joe Sterne
- Mrs Crowdy, Crowdy's wife:
- Dorothy Holmes-Gore
- Bert Fisher, a lorry driver:
- John Gabriel
- Peter Crowdy, a schoolboy:
- Anthony Green
- Annie, a publican:
- June Monkhouse
- Higgins, a busker:
- Jack Shaw
- Red, a thug:
- Eric Anderson
- A woman of the streets:
- Aline Waites
- Detective-Inspector Clark:
- John Ruddock
- Superintendent Huth:
- Jack Allen
- Miss Toup, a spinster:
- Mairhi Russell
- Sammy Donovan Peggy's young brother.:
- Timothy Harley
- Henry Holloman, patent medicine manufacturer..:
- Preston Lockwood
- Mrs Cameroni, Holloman's house keeper:
- Grace Allardyce
- A man in a queue:
- John Gabriel
- Mr Roberts, an editor:
- Jack Shaw
- Arthur Harbart, a business man:
- Eric Anderson