- Writer:
- Ted Willis
- Designer:
- Norman James
- Production:
- Douglas Moodie
- P.C. George Dixon:
- Jack Warner
- Duffy Clayton:
- Harold Scott
- First carter:
- Howard Lang
- Second carter:
- Arthur Gross
- 'Smiler' Hodges:
- Bernard Fox
- Mary:
- Jeanette Hutchinson
- Sgt. Flint:
- Arthur Rigby
- Andy Crawford C.I.D.:
- Peter Byrne
- P.C. Bob Penney:
- Anthony Parker
- Susan Wood:
- Jennifer Wilson
- Tom Munday:
- Eric Francis
- Sgt. Grace Millard:
- Moira Mannion
- P.C. Lauderdale:
- Geoffrey Adams
- Mr. Palmer:
- George Howe
- Muriel Palmer:
- Jennifer Browne
- Miss Ackland:
- Hilda Barry
- May Braunton:
- Catherine George
- P.C. Hughes:
- Graham Ashley
- Paddy, barman:
- Cecil Brock
- Liz:
- Leila Blake
