Jim McKenna (1 episode, 2014)
Dr. Ray Clemons (1 episode, 2012)
Fentris (1 episode, 2010)
Ray Duffy (1 episode, 2010)
Gabriel Fanning (1 episode, 2009)
Dr. Barry Landman (1 episode, 2005)
Glen Lynch (1 episode, 2011)
Lance Pauling (1 episode, 2009)
Peter Gray (138 episodes, 1999-2005)
John Gillnitz (1 episode, 2002)
Ted Sharperson (22 episodes, 1992-1993)
Sargie 'Fumblina' Wilkinson
Rick Upfield (1 episode, 1992)
Dr. Felix / ... (3 episodes, 2011)
Professor Marc Lasky 1 episode, 2017
Detective Jim Zdorkin 5 episodes, 2015
Artie Sneed 3 episodes, 2015-2016