Name	Known for
Campbell Singer John Unthank John Unthank See fewer	Dick Barton at Bay (1950)
Douglas Muir Bill Jessel Bill Jessel See fewer	The Avengers (1961)
Ian White Peter Clarke Peter Clarke See fewer	The Chastity Belt (1972)
Ursula Camm Mrs. Layton Mrs. Layton See fewer	BBC Sunday-Night Theatre (1950)
Allan McClelland James Wilson James Wilson See fewer	West 11 (1963)
Donald Finlay Harry Harry See fewer	Private Investigator (1958)
Brian Jackson Peter Arrowsmith Peter Arrowsmith See fewer	Saint Maud (2019)
Noel Johnson Hugo Ross-Hamilton Hugo Ross-Hamilton See fewer	Frenzy (1972)
Harry Littlewood Charles Charles See fewer	A Dorothy L. Sayers Mystery (1987)
Johanna Martin Oonagh Ross-Hamilton Oonagh Ross-Hamilton See fewer	Private Investigator (1958)
Mary Yeomans Mrs. Delrivers Mrs. Delrivers See fewer	The Human Jungle (1963)