- Josh Charles
- Â Dan Rydell 45 episodes, 1998-2000
- Peter Krause
- Â Casey McCall 45 episodes, 1998-2000
- Felicity Huffman
- Â Dana Whitaker 45 episodes, 1998-2000
- Joshua Malina
- Â Jeremy Goodwin 45 episodes, 1998-2000
- Sabrina Lloyd
- Â Natalie Hurley 45 episodes, 1998-2000
- Robert Guillaume
- Â Isaac Jaffe 45 episodes, 1998-2000
- Kayla Blake
- Â Kim 45 episodes, 1998-2000
- Greg Baker
- Â Elliott 45 episodes, 1998-2000
- Timothy Davis-Reed
- Â Chris 45 episodes, 1998-2000
- Jeff Mooring
- Â Dave 44 episodes, 1998-2000
- Ron Ostrow
- Â Will 44 episodes, 1998-2000
- Suzanne Kellogg
- Â Alyson 12 episodes, 1998-2000
- Rose Colasanti
- Â Billi 2 episodes, 1999-2000
- Ted McGinley
- Â Gordon 8 episodes, 1998-1999
- Teri Polo
- Â Rebecca Wells 8 episodes, 1999-2000
- Brenda Strong
- Â Sally Sasser 7 episodes, 1998-2000
- Darren Foreman
- Â Jack 7 episodes, 1999-2000
- William H. Macy
- Â Sam Donovan 6 episodes, 1999-2000
- Jayne Brook
- Â Abby Jacobs 4 episodes, 1999-2000
- Robert Mailhouse
- Â J.J. 4 episodes, 1998-1999
- Amy Powell
- Â Kelly Kirkpatrick 4 episodes, 1998-2000
- Paula Marshall
- Â Jenny 3 episodes, 2000
- James Edson
- Â Mike Greenwey / ... 3 episodes, 1998-2000
- Josephine Barnsdale
- Â Celia / ... 3 episodes, 1999
- Clark Gregg
- Â The Stranger 2 episodes, 2000
- Megan Ward
- Â Pixley Robinson 2 episodes, 1999-2000
- Tim DeKay
- Â Ray Mitchel 2 episodes, 1999-2000
- Lisa Edelstein
- Â Bobbi Bernstein 2 episodes, 1999
- David Macer
- Â Phil 2 episodes, 1999
- Tom Cavanagh
- Â Howard 2 episodes, 1999-2000
- Dennis Hadley
- Â Stuart 2 episodes, 1999
- Peter Riegert
- Â Jay Rydell 1 episode, 2000
- Spencer Garrett
- Â Peter Sadler 1 episode, 2000
- Brad William Henke
- Â Christian Patrick 1 episode, 1998
- Janel Moloney
- Â Monica Brazelton 1 episode, 1998
- Yeardley Smith
- Â Malory Moss 1 episode, 1998
- David Graf
- Â Chase 1 episode, 1998
- Felton Perry
- Â Man 1 episode, 1998
- Eric Bruskotter
- Â Kyle Whitaker 1 episode, 1999
- Alanna Ubach
- Â Catherine Brenner 1 episode, 2000
- Joy Behar
- Â Joy Behar 1 episode, 1998
- Aaron Lustig
- Â Gilbert 1 episode, 1998
- Jon Simmons
- Â Burke 1 episode, 1998
- Alicia Coppola
- Â Leesa 1 episode, 1999
- Charlie Finn
- Â Corbin Davis 1 episode, 1999
- Richard Steinmetz
- Â Shane McArnold 1 episode, 1999
- Cory Buck
- Â Charlie McCall 1 episode, 1999
- Cress Williams
- Â Steve Sarris 1 episode, 2000
- Ray Wise
- Â Evans 1 episode, 1998
- Star Jones
- Â Star Jones 1 episode, 1998
- Bernard Hocke
- Â Dave 1 episode, 1998
- Nina Siemaszko
- Â Holly 1 episode, 1999
- Derek Webster
- Â Oscar 1 episode, 2000
- Debbie Matenopoulos
- Â Debbie Matenopoulos 1 episode, 1998
- A. Russell Andrews
- Â Matt McGreger 1 episode, 1998
- Meredith Vieira
- Â Meredith Vieira 1 episode, 1998
- Nina Barry
- Â Claire 1 episode, 1998
- Jolie Jackunas
- Â Stacy 1 episode, 1998
- John de Lancie
- Â Bert Stors 1 episode, 2000
- Allen Garfield
- Â Chuck 'The Cut Man' Kimmel 1 episode, 2000
- Tawny Moyer
- Â Libby 1 episode, 1998
- Nadia Dajani
- Â Tina Lake 1 episode, 1999
- Mary Ostrow
- Â Female Patient 1 episode, 1999
- Katie O'Rourke
- Â Judith 1 episode, 1999
- Dafidd McCracken
- Â Patient 1 episode, 1999
- Susan Leslie
- Â Karen 1 episode, 2000
- Kelly McNair
- Â Woman 1 episode, 2000
- John Kidd
- Â Aaron 1 episode, 2000
- Bari Hochwald
- Â Billie Tasker 1 episode, 1999
- Mary B. McCann
- Â Woman #2 1 episode, 2000
- James Goss
- Â Commissioner 1 episode, 2000
- Lisa Welti
- Â Redhead 1 episode, 1999
- Laura Ford
- Â Waitress 1 episode, 1999
- Brad Tanenbaum
- Â Intern 1 episode, 1999
- Justine Shoemaker
- Â Ginger 1 episode, 1999
- Geraud Moncure
- Â Announcer #1 1 episode, 2000
- Doyle Holmon
- Â Roland Shepard 1 episode, 1998
- Brett Barrett
- Â Walter 1 episode, 1999
- Mel Proctor
- Â Announcer #2 1 episode, 2000
- Michael R Bowman
- Â Control Room Operator / ... (uncredited) 6 episodes, 1999
- Patrick A. Horton
- Â On Set Network 'Suit' (uncredited) 6 episodes, 1999
- Kim McCall
- Â Technical Switcher Extra (uncredited) 2 episodes, 1998-2000
- Joe Whyte
- Â Mountain Climber (uncredited) 1 episode, 1998
- John Wilkie
- Â Track star (uncredited) 1 episode, 1998
- Loretta Shenosky
- Â Marsha (uncredited) 1 episode, 1998
- Thom Pinto
- Â Announcer #2 (uncredited) 1 episode, 1998
- Janet Ashikaga
- Â Editor (uncredited) 1 episode, 1998
- Maureen Gates
- Â Maureen Gates (uncredited) 1 episode, 1998
- Ed Shifres
- Â Videotape Stuntman (uncredited) 1 episode, 1998
- Monica Weinger
- Â Monica Weinger (uncredited) 1 episode, 1998
- Joseph Roveto
- Â Joseph Roveto (uncredited) 1 episode, 1998
- Aaron Sorkin
- Â Man at Bar (uncredited) 1 episode, 1999
- Stephen Rollins
- Â Erwin Beaumont (uncredited) 1 episode, 1999
- Frank C. Williams
- Â Sports Announcer (uncredited) 1 episode, 1999
- Cheryl Hunter
- Â Bartender (uncredited) 1 episode, 1999
- Joyce Bradsher
- Â Toni (uncredited) 1 episode, 1999
- Christopher Francis
- Â Staff Member (uncredited) 1 episode, 2000
- Tom Huben
- Â Testimonial (uncredited) 1 episode, 2000
- Jim Brooks
- Â Mitchell (uncredited) 1 episode, 2000