Bingham (8 episodes, 2012)
Sir William Lucy 1 episode, 2016
Svedberg (3 episodes, 2008)
Dominick Chilcott (1 episode, 2008)
Paul Miller / ... (3 episodes, 2000-2012)
Captain Rogers / ... (2 episodes, 1999-2004)
Third Duke of Richmond (unknown episodes)
Martin Fulmer / ... (2 episodes, 2002-2008)
Roger Horace-Brown (3 episodes, 1997)
Bill Pickley (2 episodes, 2007)
Dr. Daniel Acres (4 episodes, 1993)
Duke of Merton 1 episode, 2000
Lord Howard 2 episodes, 2014
Mr. Bowles unknown episodes
DSI Alan Reece (3 episodes, 2013)