Name	Known for
Jack Galloway Robert Mackenzie Robert Mackenzie See fewer	A Bridge Too Far (1977)
Sheila Ruskin Diana Crawley Diana Crawley See fewer	Mackenzie (1980)
Kara Wilson Jean Mackenzie Jean Mackenzie See fewer	The Children of the New Forest (1964)
Richard Marner George Kovacs George Kovacs See fewer	The Sum of All Fears (2002)
Lynda Bellingham Ruth Isaacs Ruth Isaacs See fewer	The Romanovs: An Imperial Family (2000)
Toby Salaman David Isaacs David Isaacs See fewer	24 Hour Party People (2002)
William Russell Francis Hammond Francis Hammond See fewer	The Great Escape (1963)
Andrew Gray Jamie Mackenzie Jamie Mackenzie See fewer	Mackenzie (1980)
David Donaldson Duncan Mackenzie Duncan Mackenzie See fewer	Mackenzie (1980)
Helen Cherry Caroline Crawley Caroline Crawley See fewer	His Excellency (1952)
Paul Mark Elliott Piers Crawley (as Mark Elliott) Piers Crawley (as Mark Elliott) See fewer	Overdrive (2017)
Clifford Parrish Tim Crawley Tim Crawley See fewer	The Forsyte Saga (1967)
Russell Hunter Mr. Armstrong Mr. Armstrong See fewer	Callan (1974)
Anne Kristen Mrs. Armstrong Mrs. Armstrong See fewer	The View from Daniel Pike (1971)
Ida Schuster Annie Robertson Annie Robertson See fewer	Death Watch (1980)
James Copeland Andy Robertson Andy Robertson See fewer	The Saint (1962)
Peter Attard Paul Davies Paul Davies See fewer	To Sir, with Love (1967)
Bernard Holley Tony Duggan Tony Duggan See fewer	The Tripods (1984)
Pauline Winter Nanny Wilkinson Nanny Wilkinson See fewer	Five to One (1963)
David Lyon Doctor Doctor See fewer	House of Cards (1990)
Louise Breslin Sister Sister See fewer	The Three Princes (1968)
Colette Martin Night Nurse Night Nurse See fewer	Brotherhood of the Wolf (2001)
Valerie Fyfer Day Nurse Day Nurse See fewer	Cumbernauld Hit (1977)