- Jef Maynard
- toolmaster / tool master (109 episodes, 1990-1995)
- Patrick Brantseg
- utility infielder / intern / puppeteer: Gypsy / technical puppetry (81 episodes, 1992-1999)
- Bradley J. Keely
- technical supervisor (79 episodes, 1994-1999)
- Kevin Murphy
- puppeteer: Tom Servo / puppeteer / this week's creative pit boss (78 episodes, 1990-1999)
- Tim Johnson
- controller (75 episodes, 1994-1999)
- Heide LeClerc
- manager of business affairs / manager: business affairs (69 episodes, 1991-1994)
- Timothy Scott
- technical supervisor (70 episodes, 1991-1994)
- Ellen McDonough Thomas
- production coordinator / production assistant (70 episodes, 1992-1995)
- Jim Mallon
- puppeteer: Gypsy / puppeteer / this week's creative pit boss (69 episodes, 1990-1997)
- Jann Johnson
- production coordinator / production assistant / post-production coordination (65 episodes, 1989-1994)
- Trace Beaulieu
- puppeteer / puppeteer: Crow T. Robot / this week's creative pit boss / this week's creative pitt boss (58 episodes, 1990-1996)
- Sarah E. Wisner
- production assistant (56 episodes, 1992-1995)
- Barb Tebben
- info club Poobah / info club poobah / assistant poobah (55 episodes, 1995-1999)
- Julie Walker
- info club poobah / info club coordinator (27 episodes, 1994-1996)
- Jeff Stonehouse
- video provided by (26 episodes, 1994-1996)
- Cyn Eells
- intern (24 episodes, 1991-1992)
- Christopher Wurst
- intern (24 episodes, 1991-1992)
- Pete Keffer
- intern (24 episodes, 1993-1994)
- Michael J. Sheehan
- intern (24 episodes, 1993-1994)
- E. Jane Short
- intern (24 episodes, 1993-1994)
- Rob Burkhardt
- engineer (22 episodes, 1992-1993)
- Alexandra Carr
- production assistant / fan club coordinator (21 episodes, 1988-1989)
- Bill Corbett
- puppeteer: Crow T. Robot (21 episodes, 1997-1999)
- Stephanie Hynes
- intern (17 episodes, 1993)
- Michael Parker
- intern / production assistant (16 episodes, 1994-1996)
- Steve Rosenberer
- production assistant (13 episodes, 1989-1990)
- Sara J. Sandborn
- production assistant (13 episodes, 1989-1990)
- Robert Czech
- intern (13 episodes, 1990-1991)
- Amy Kane
- intern (13 episodes, 1990-1991)
- Michelle Molhan
- intern (13 episodes, 1990-1991)
- Nathan Molstead
- intern (13 episodes, 1990-1991)
- Ken Fournelle
- production staff (12 episodes, 1989-1990)
- Jim Fuller
- production staff (12 episodes, 1989-1990)
- Tamra Lewis
- intern (12 episodes, 1990-1991)
- Cindy Hansen
- intern (12 episodes, 1991-1992)
- Thomas Alphonso
- intern (12 episodes, 1991)
- Tom Henderson
- intern (12 episodes, 1991)
- Nathan Devery
- intern (12 episodes, 1992)
- Wendell Jon Andersson
- intern (12 episodes, 1994-1995)
- Sarah Swanson
- intern (12 episodes, 1994-1995)
- Dave Bellmont
- intern (12 episodes, 1994)
- Shannon McNeely
- intern (12 episodes, 1994)
- Peter Nicolai
- intern (12 episodes, 1994)
- Dan Breyer
- intern (12 episodes, 1997-1998)
- Curtis Anderson
- intern (11 episodes, 1992-1993)
- Jim Erickson
- production staff (9 episodes, 1989-1990)
- Melanie Hartley
- production assistant (9 episodes, 1989-1990)
- Suzette Jamison
- intern (8 episodes, 1992)
- Jim Smith
- intern (8 episodes, 1990)
- Danica King
- intern (7 episodes, 1995-1996)
- Kelly Schrandt
- intern (7 episodes, 1995-1996)
- Scott Bowman
- intern (7 episodes, 1997-1998)
- Elliot Cobb
- intern (7 episodes, 1997)
- Mytch Parks
- intern (7 episodes, 1997)
- Nick Prueher
- intern (7 episodes, 1998-1999)
- Erin Erskine
- intern (7 episodes, 1999)
- Josh Huschke
- intern (7 episodes, 1999)
- Neil Brede
- production assistant (6 episodes, 1990)
- Barb Oswald
- junior toolmaster (6 episodes, 1992-1993)
- Meshach Weber
- intern (6 episodes, 1997)
- Ed Dykhuizen
- intern (6 episodes, 1999)
- Sarah Lemanczyk
- intern (6 episodes, 1999)
- Kelly Nathe
- intern (5 episodes, 1992)
- Steven Sande
- intern (5 episodes, 1992)
- Jeffrey P. Young
- director of operations (5 episodes, 1994)
- Todd Severson
- intern (5 episodes, 1997-1998)
- Dan Tanz
- intern (5 episodes, 1998)
- Julie Van Goethem
- intern (4 episodes, 1994)
- Ben Mooers
- intern (4 episodes, 1996)
- Tammara Melloy
- intern (4 episodes, 1997)
- Joseph Olson
- intern (4 episodes, 1997)
- Randall Smith
- intern (4 episodes, 1997)
- Joel Hodgson
- this week's creative pit boss (3 episodes, 1990-1991)
- Brendan Glynn
- intern (3 episodes, 1992)
- Kirsten Lind
- choreographer (2 episodes, 1993)
- Debra Baxter
- intern (2 episodes, 1995-1996)
- Beez McKeever
- intern (2 episodes, 1996)
- Lane Stiller
- intern (2 episodes, 1997)
- Steve Zocklein
- intern (2 episodes, 1997)
- Michael J. Nelson
- this week's creative pit boss (1 episode, 1990)
- Elisabet Sandberg
- production staff (1 episode, 1990)
- Bruce Paul Barbour
- fan letter author (1 episode, 1991)
- Cutris Anderson
- intern (1 episode, 1992)
- Nancy Mason
- resusci-annie provided by (1 episode, 1992)
- Josef Diethelm
- alpine horn provided by (1 episode, 1993)
- Mary Banovetz
- production assistant (1 episode, 1995)
- Brian Bull
- intern (1 episode, 1998)
- Brian Henry
- guest intern (1 episode, 1999)
- Donald O'Conner
- commissioning editor (uncredited) / general manager: KTMA-TV (uncredited) (1 episode, 1988)