- Writer:
- Robert Gould
- Producer:
- Terence Dudley
- Film sequences - Cameraman:
- A.A. Englander
- Film sequences - Editor:
- Seymour Logie
- Designer:
- Lionel Radford
- Music and special effects:
- BBC Radiophonic Workshop
- Inspector Maxwell:
- John Martin
- Dr Alan Tullis:
- Ray Roberts
- Nurse:
- Carole Ward
- Mrs Weatherfield:
- Helen Horton
- Sir Robert Nailer:
- William Dexter
- Ilson:
- John Moore
- Janet Nailer:
- Susan Purdie
- Sklorski:
- Frank Fenter
- Mrs Stone:
- Joan Frank
- Lady Nailer:
- June Tobin
- Bruton:
- Michael Browning
- Anderson:
- Frederick Treves
- Kemble:
- Robert Fyfe
- Merridale:
- Ian Hughes
- Doctor:
- Philip Stone
- Sister:
- Julie Paul
- Pam:
- Laura Graham
- Chief Supt Stroud:
- George Street
- Mathews:
- Frank Shelley
- Newsreader:
- Alex MacIntosh
- Enders:
- John Colin
- Currell:
- Lewis Teesdale
- Sergeant O'Keefe:
- Edwin Brown
- Technician:
- Geoffrey Hibbert
- Other technician:
- Tex Fuller
- Other technician:
- Monty Warren
- Other technician:
- Eric Hagan
- Other technician:
- Stephen Mann
- Policeman:
- John Barrett
- Policeman:
- John Lawrence
- Policeman:
- Rex Robinson
