
| Ted Danson | ... | Dr. John Becker (129 episodes, 1998-2004) |
 | Hattie Winston | ... | Margaret Wyborn / ... (129 episodes, 1998-2004) |

| Shawnee Smith | ... | Linda (129 episodes, 1998-2004) |

| Alex Désert | ... | Jake Malinak (127 episodes, 1998-2004) |

| Saverio Guerra | ... | Bob (109 episodes, 1998-2003) |

| Terry Farrell | ... | Regina "Reggie" Kostas / ... (94 episodes, 1998-2002) |

| Nancy Travis | ... | Chris Connor (39 episodes, 2002-2004) |

| Jorge Garcia | ... | Hector Lopez (13 episodes, 2003-2004) |

| Damon Standifer | ... | Mr. Williams (5 episodes, 1998-2000) |

| Frances Fisher | ... | Dr. Elizabeth 'Liz' Carson (5 episodes, 1999-2000) |

| Barbara Sharma | ... | Mrs. Recinos (5 episodes, 2000-2002) |
 | Marvin Kaplan | ... | Mr. Gordon (4 episodes, 1998-2004) |

| Sara Mornell | ... | Anita (4 episodes, 2000-2001) |
 | David Moreland | ... | Grenquist / ... (3 episodes, 1998-2002) |

| Annie Wood | ... | Theresa Campbell (3 episodes, 1998-2000) |
 | Robert Bailey Jr. | ... | M.J. Johnson (3 episodes, 1998-1999) |
 | Troy Evans | ... | Detective Borkow / ... (3 episodes, 1999-2002) |

| Derek Basco | ... | Jimmy (3 episodes, 1999-2000) |
 | Elya Baskin | ... | Alexi / ... (3 episodes, 1999-2000) |
 | Connie Sawyer | ... | Mrs. Yudelson (3 episodes, 1999) |

| Molly Hagan | ... | Sara / ... (3 episodes, 2000-2001) |

| Lindsay Price | ... | Amanda (3 episodes, 2001-2003) |

| Alan Blumenfeld | ... | Vinny Deluca / ... (3 episodes, 2001) |
 | Kenneth Mars | ... | Melvin (3 episodes, 2001) |
 | Mary Gillis | ... | Mrs. Jordan (2 episodes, 1998-2001) |
 | Bill Capizzi | ... | Capelli / ... (2 episodes, 1998-2000) |
 | Scott Manning | ... | Waiting Patient (2 episodes, 1998-1999) |
 | Davenia McFadden | ... | Annette Johnson (2 episodes, 1998-1999) |
 | James Lorinz | ... | Manny (2 episodes, 1998) |
 | David Correia | ... | Alston / ... (2 episodes, 1999-2002) |
 | Robert Arce | ... | Walter (2 episodes, 1999-2000) |

| Kenneth Ryan | ... | Frank / ... (2 episodes, 1999-2000) |
 | Ivan G. Anderson | ... | Billy (2 episodes, 1999) |
 | William Hill | ... | Mr. Ehrlich (2 episodes, 1999) |
 | Russ Woody | ... | Mr. Pearson (2 episodes, 2000-2002) |
 | Frank D'Amico | ... | Chuck / ... (2 episodes, 2000-2001) |

| Jaclyn Smith | ... | Megan (2 episodes, 2000-2001) |
 | Adrian Wenner | ... | Brad (2 episodes, 2000) |
 | Scot Zeller | ... | Guy / ... (2 episodes, 2000) |
 | Mary Jo Smith | ... | Mrs. Goldman (2 episodes, 2001-2002) |

| Danny Woodburn | ... | Arnoldo (2 episodes, 2001-2002) |
 | Jane Clayson | ... | Herself (2 episodes, 2001) |

| Judyann Elder | ... | Judge Reinhold (2 episodes, 2001) |

| Mariel Hemingway | ... | Ruth (2 episodes, 2001) |
 | Tim Rhoze | ... | Ming (2 episodes, 2001) |

| Jason Sklar | ... | Donnie (2 episodes, 2001) |
 | Randy Sklar | ... | Ricky (2 episodes, 2001) |

| Shawn Christian | ... | Kevin (2 episodes, 2002-2003) |
 | James Pickens Jr. | ... | Cliff / ... (2 episodes, 2002-2003) |
 | Carla Toutz | ... | Holli (2 episodes, 2002-2003) |
 | Wendell Wright | ... | Mr. Franklin (2 episodes, 2002-2003) |

| Floyd Van Buskirk | ... | Delivery Guy (2 episodes, 2002) |
|
| Dave Hackel | .... | executive producer (86 episodes, 1998-2004) |
| Tim Berry | .... | producer / executive producer (58 episodes, 1999-2004) |
| Matthew Weiner | .... | co-producer / producer (48 episodes, 2000-2002) |
| Ian Gurvitz | .... | executive producer (8 episodes, 2003) |
|
| Liz Astrof | .... | co-producer (unknown episodes, 2003) |
| Maisha Closson | .... | co-producer (unknown episodes, 2003) |
| Gary Dontzig | .... | co-executive producer (unknown episodes, 2003) |
| Gigi McCreery | .... | supervising producer (unknown episodes, 2003) |
| Steven Peterman | .... | co-executive producer (unknown episodes, 2003) |
| Perry M. Rein | .... | supervising producer (unknown episodes, 2003) |
| Michael Rowe | .... | producer (unknown episodes, 2003) |
| Russ Woody | .... | co-executive producer (unknown episodes, 2003) |
| Andy Ackerman | .... | producer (unknown episodes) |
| Matt Ember | .... | consulting producer (unknown episodes) |
| Michael Markowitz | .... | co-producer (unknown episodes) |
| Lori A. Moneymaker | .... | co-producer / producer (unknown episodes) |
| Marsha Myers | .... | co-producer / producer (unknown episodes) |
| Ross Woody | .... | producer (unknown episodes) |
| |
|
| Zuzana Cernik | .... | assistant to executive producer (128 episodes, 1998-2004) |
| Mark Maitlen | .... | production secretary / production coordinator (54 episodes, 2001-2004) |
| David Isaacs | .... | creative consultant (42 episodes, 1999-2004) |
| Bob Ellison | .... | creative consultant (35 episodes, 1999-2003) |
| Matthew Weiner | .... | executive story editor (24 episodes, 1999-2000) |
| Naisa Wong | .... | assistant coordinator (24 episodes, 2001-2002) |
| Richard T. Arami | .... | assistant accountant (13 episodes, 2003-2004) |
| Trip Gould | .... | production secretary (13 episodes, 2003-2004) |
| Howie Edelson | .... | production assistant (11 episodes, 1999-2000) |
| Brian Reeder | .... | production assistant (11 episodes, 1999-2000) |
|
| Georgyne LaLone | .... | assistant: Bob Ellison (unknown episodes, 1998-2002) |
| Keith Addis | .... | executive consultant (unknown episodes) |
| Shelley Andagan | .... | production assistant (unknown episodes) |
| Ken Blankstein | .... | script coordinator (unknown episodes) |
| Gena Bravos | .... | script supervisor (unknown episodes) |
| Chris Brougham | .... | technical coordinator (unknown episodes) |
| Gaye Ann Bruno | .... | photo publicity (unknown episodes) |
| Kimberli Collette | .... | assistant to producer / production assistant (unknown episodes) |
| Jeff Collins | .... | assistant to producer / production assistant (unknown episodes) |
| Anne Flett-Giordano | .... | creative consultant (unknown episodes) |
| Suzanne Goddard-Smythe | .... | assistant to producer / production assistant (unknown episodes) |
| Rob Greenberg | .... | creative consultant (unknown episodes) |
| Ken Halsband | .... | location manager (unknown episodes) |
| Kristin Jones | .... | production assistant (unknown episodes) |
| H. Lee Kagan | .... | medical consultant (unknown episodes) |
| Kim Kessler | .... | assistant to producer (unknown episodes) |
| Dana Klein | .... | story editor (unknown episodes) |
| Michael Markowitz | .... | executive story editor (unknown episodes) |
| Conner McKinley | .... | assistant to producer (unknown episodes) |
| Marsha Myers | .... | executive story editor (unknown episodes) |
| Kimberley Nessler | .... | production assistant (unknown episodes) |
| Teresa O'Neill | .... | creative consultant (unknown episodes) |
| Jayme Petrille | .... | assistant to producer / production assistant / ... (unknown episodes) |
| Chris Porterfield | .... | production coordinator (unknown episodes) |
| Christopher Porterfield | .... | production coordinator (unknown episodes) |
| Chuck Ranberg | .... | creative consultant (unknown episodes) |
| Sean Simmons | .... | production assistant (unknown episodes) |
| Susan Stein | .... | assistant to producer / production assistant (unknown episodes) |
| Michael Uppendahl | .... | assistant to producer / production assistant (unknown episodes) |
| Tennille Vega | .... | production assistant (unknown episodes) |
| Dena Waxman | .... | assistant to producer (unknown episodes) |
| |