- Writer:
- Elaine Morgan
- Producer:
- Alan Bromly
- Designer:
- Roy Oxley
- Alec Gordon:
- Peter Hammond
- Bill:
- John Breslin
- Daphne Howard:
- Noelle Middleton
- Assistant at Library:
- Margaret Allworthy
- Walter Stanley:
- Reginald Barratt
- Mrs. Howard:
- Susan Richmond
- Sir Basil:
- Andrew Cruickshank
- Barton:
- Noel Davis
- Waitress:
- Diana van Proosdy
- Len:
- Meadows White
- Bob:
- Frank Pemberton
- Man in cafe:
- Peter Wayn
- Woman in cafe:
- Jane Meredith
- Joe Briggs:
- Charles Lamb
- Charlie:
- John Miller
- Polly:
- Betty Woolfe
- Barmaid of the 'Green Dragon':
- Molly Lumley
- Interviewer on TV:
- Donald Gray
- Grette Brinson:
- Jill Bennett
- Inspector Plummer:
- Anthony Woodruff
- Reporter in Sir Basil's flat:
- Ann Wrigg
- Reporter in Sir Basil's flat:
- Dennis Edwards
- Reporter in Sir Basil's flat:
- Bryan Kendrick
- Reporter in Sir Basil's flat:
- Charles Herdman
- Prosecuting Counsel:
- Michael Gover
- Alec's landlady:
- Grace Arnold
- Usher:
- Leonard Sharp
- The Judge:
- Ronald Adam
- Clerk of the Court:
- Bart Allison
- Reporter outside the Courtroom:
- Gerald Flood
- Reporter outside the Courtroom:
- John Scott
- Reporter outside the Courtroom:
- Derek Nimmo
- Boy at Stonehenge:
- Keith Crane
- Boy at Stonehenge:
- Colin McLean
- Radio commentator:
- Raymond Baxter