Christopher Timothy James Herriot Actor Robert Hardy Siegfried Farnon Actor Peter Davison Tristan Farnon Actor Carol Drinkwater Helen Alderson Actor John Collin Mr Alderson Actor Janet Davies Mrs. Dalby Actor Ivor Salter Gobber Newhouse Actor Nicholas McArdle Mr Worley Actor Norman Mann Richard Edmundson Actor Rio Fanning Mulligan Actor John Hallet PC Smith Actor John Who Charlie Actor Katharine Page Aunt Lucy Actor Rita Giovannini Daphne Actor Stephen Bratt William Dalby Actor Terence Dudley Director James Herriot Writer