- Tracey Conway
- Â Various 3 episodes, 1991-1996
- Pat Cashman
- Â Various 3 episodes, 1991-1996
- Bob Nelson
- Â Various 3 episodes, 1991-1996
- John Keister
- Â Various 3 episodes, 1991-1996
- Nancy Guppy
- Â Various 2 episodes, 1996
- Steve Wilson
- Â Various 2 episodes, 1996
- Bill Stainton
- Â Various 2 episodes, 1996
- Joel McHale
- Â Various 2 episodes, 1996
- Michael Jordan
- Â Self 1 episode, 1990
- Davy Jones
- Â Self 1 episode, 1990
- Amber Matthews
- Â Young Alien - 2002 1 episode, 1990
- Jillian Armenante
- Â Emma Todd 1 episode, 1991
- Scott Harron
- Â Local PBS Employee 1 episode, 1994
- Ralph Bevins
- Â Jet Guy 1 episode, 1995
- John Billingsley
- Â Bill Gates 1 episode, 1996
- Dave Grohl
- Â Self 1 episode, 1996
- Kaefan Shaw
- Â Gavin Ricketts 1 episode, 1996
- Ross Shafer
- Â Various (1984-1988) unknown episodes
- Chip Hanauer
- Â Self (1985-1996) unknown episodes
- Aaron Haedt
- Â Utility Worker (1996) unknown episodes
- Lauren Weedman
- Â Various (1997-1999) unknown episodes
- Barbara Klansnic
- Â Various (1997-1999) unknown episodes
- Bill Nye
- Â Various unknown episodes
- David Scully
- Â Various unknown episodes
- Kim Evey
- Â Various unknown episodes
- Darrell Suto
- Â Billy Quan / ... unknown episodes
- Ed Wyatt
- Â Various unknown episodes
- Steve Pacaud
- Â Various (uncredited) 1 episode, 1994
