Friedrich Hirsch (1 episode, 2011)
Archivist (1 episode, 2012)
Barista (1 episode, 2013)
Mr Sheepshanks / ... (3 episodes, 1999)
Jim Tonkinson / ... (2 episodes, 1999-2008)
Dr. Vickery (7 episodes, 1997-2000)
Mr. Carpenter (unknown episodes)
Mr. Bambridge (4 episodes, 1994)
Supt. Stonehill (unknown episodes)
Chief Insp. Jack 'Brock' Lovat
Bob Jackson / ... (2 episodes, 1990-1997)
Mr. Lawson / ... (2 episodes, 1989-1998)
Chief executive / ... (4 episodes, 1976-1981)
Baz Bailey (10 episodes, 1988)
Major Archie 1 episode, 2015