- Writer:
- Ted Willis
- Designer:
- Norman James
- Production:
- Douglas Moodie
- P.C. George Dixon:
- Jack Warner
- Sergeant Ross:
- John Baker
- Chief Superintendent Collins:
- Anthony Woodruff
- Det-Sgt Andy Crawford:
- Peter Byrne
- Sergeant Flint:
- Arthur Rigby
- P.C. Lauderdale:
- Geoffrey Adams
- W.P.C. Kay Shaw:
- Jocelyne Rhodes
- Ned Cooney:
- Harry Hutchinson
- Sgt Grace Millard:
- Moira Mannion
- Poppa Akhilles:
- Hamlyn Benson
- Det-Con Tommy Hughes:
- Graham Ashley
- First Seaman:
- Walter Randall
- Second Seaman:
- Mellan Mitchell
- Cadet Jamie MacPheraon:
- David Webster
- Helen Layton:
- Carol Ann Ford
- Hilda Cooney:
- Bernadette Milnes
- Captain Rostov:
- Alexis Chesnakov
- Paddy Cooney:
- Margo Mayne
- Stefan Koragin:
- Peter Zander
