Name	Known for
Patrick Allen Brett Brett See fewer	Dial M for Murder (1954)
Michael Hawkins Spencer Griffiths Spencer Griffiths See fewer	Dentist in the Chair (1960)
Robin Bailey Nick Brunei Nick Brunei See fewer	Having a Wild Weekend (1965)
Geoff Chong Koshi Koshi See fewer	Brett (1971)
Windsor Davies Sir Geronwy Griffiths Sir Geronwy Griffiths See fewer	It Ain't Half Hot Mum (1974)
Alan Downer Rhys Rhys See fewer	Triton (1968)
Mostyn Evans Llewelyn Llewelyn See fewer	Doctor Who (1963)
Hannah Gordon Francoise Brett Francoise Brett See fewer	The Elephant Man (1980)
Glyn Houston Morris Morris See fewer	The Great Game (1953)
Hayden Jones Clough (as Haydn Jones) Clough (as Haydn Jones) See fewer	The Avengers (1961)
Alan Keith Kramer Kramer See fewer	Whistling in the Dark (1938)
Jennifer Lee Gwyneth Gwyneth See fewer	The Man Who Was Hunting Himself (1972)
Jean MacFarlane Lois Lois See fewer	Doctor Who (1963)
Reg Pritchard Pugh Pugh See fewer	Doctor Who (1963)
Guto Roberts Proctor Proctor See fewer	Snowdonia 1890 (2017)
Frank Sieman Gregg Gregg See fewer	The Avengers (1961)