Poirot starts receiving mocking letters with allusions to crimes-to-be, signed "ABC".
David Suchet as Hercule Poirot Hugh Fraser as Captain Hastings Philip Jackson as Chief Inspector Japp Donald Sumpter as Cust Donald Douglas as Franklin Clarke Nicholas Farrell as Donald Fraser Pippa Guard as Megan Barnard Cathryn Bradshaw as Mary Drower Nina Marc as Thora Grey David McAlister as Inspector Glen Vivienne Burgess as Lady Clarke Ann Windsor as Miss Merrion Michael Mellinger as Franz Ascher Miranda Forbes as Mrs Turton Peter Penry-Jones as Superintendent Carter Lucinda Curtis as Mrs Marbury Jeremy Hawk as Deveril Allan Mitchell as Dr Kerr Philip Anthony as Doctor Andrew Williamson as Man in Library John Breslin as Mr Barnard Clifford Milner as Constable Claude Close as Doncaster Sergeant Alex Knight as Andover Sergeant David Fox as Scotland Yard Sergeant (as David Richard-Fox) Campbell Graham as Mr. Downes Gordon Salkilld as Commissionaire Norman McDonald as Mr Strange Jane Birdsall as Nurse Pat Gorman as Desk Sergeant Tony Red Richards as Librarian
