Conductor (1 episode, 2016)
Harry Kirkland 1 episode, 2012
Mitch Greenberg (1 episode, 2013)
Frank Mann (3 episodes, 2013-2015)
Dr. Donald Langdon (1 episode, 2013)
Leonard Olsen (1 episode, 2013)
Dr. Feld (1 episode, 2006)
Dr. Joseph Cacaci (31 episodes, 1997-1999)
Mr. Carver (2 episodes, 2003)
Impatient Diner (1 episode, 1998)
Mr. Parnell (1 episode, 1996)
Cameraman / ... (2 episodes, 1986-1988)
Cafeteria Man (1 episode, 1990)
Scientist 1 episode, 2018