Matthew
Gus
Carter
Mr. William Garraty
Dingo Dan
Jay Levy
Hugo + Others
John Gruen
Mr. Marsh
Agent Garrick
Charlie Smith (3 episodes)
Dominic (1 episode)
Self (2 episodes)
George Roy Hill (voice) (4 episodes)
Kevin Sullivan
Dr. Salzman
Lance Hornsby (24 episodes)
Mr. Westbury (1 episode)
Robert Underwood Johnson
William Ruckelshaus (1 episode)
Dr. Mason (1 episode)
Trey Harrington (1 episode)
Kevin Sullivan (4 episodes)
Zee
Mark Day
Loretta's Friend
Matt Jensen (34 episodes)
Wes (Joe's Lawyer)
Tom Shannon
Arthur Gilroy (3 episodes)
Adam
Hank Foxx (6 episodes)
Becket
Drew Gardner (1 episode)
Sammy's Dad
Daniel
The Ogre
Raymond
Harry (voice)
Graham
Judge Edward Serena (1 episode)
Robert Irwin
Victor
Matt Downing
Self (voice)
Roderick
Playwright
Additional Writing
Mr. Reardon (1 episode)
Charlie Ross
Todd Anderson
Thanks
Cons
Justin Reid (1 episode)
Man (uncredited)
Joe Pace
Lawrence Gilbert (1 episode)
Research Tech
Gilbert Blackwell
Dodo / Aardvark (voice)
John Roth
Dr. Thomas (6 episodes)
Matt
David Keenan
Michael Herlihy (2 episodes)
Tass Richards
William O'Hara
Jeffrey Hawks
Jim Green
Roberto Canessa
Young Carl
Laura's Boyfriend
Lovely / Lovely Mead (3 episodes)
Swenson
Timothy
Young Charles Ives