
| John Lithgow | ... | Dr. Dick Solomon (139 episodes, 1996-2001) |

| Kristen Johnston | ... | Sally Solomon (139 episodes, 1996-2001) |
 | French Stewart | ... | Harry Solomon (139 episodes, 1996-2001) |

| Joseph Gordon-Levitt | ... | Tommy Solomon (133 episodes, 1996-2001) |

| Jane Curtin | ... | Dr. Mary Albright (119 episodes, 1996-2001) |
 | Simbi Khali | ... | Nina Campbell / ... (105 episodes, 1996-2001) |
 | Elmarie Wendel | ... | Mrs. Mamie Dubcek (70 episodes, 1996-2001) |
 | Wayne Knight | ... | Officer Don Orville / ... (64 episodes, 1996-2001) |
 | Ian Lithgow | ... | Leon (48 episodes, 1996-2001) |

| David DeLuise | ... | Bug Pollone (48 episodes, 1996-2001) |

| Chris Hogan | ... | Aubrey Pitman (44 episodes, 1996-2001) |

| Danielle Nicolet | ... | Caryn (44 episodes, 1996-2001) |

| Ileen Getz | ... | Judith Draper (32 episodes, 1996-2001) |

| Shay Astar | ... | August (25 episodes, 1996-1999) |

| Larisa Oleynik | ... | Alissa Strudwick (21 episodes, 1998-2000) |
 | Jan Hooks | ... | Vicki Dubcek (16 episodes, 1996-2000) |

| Ron West | ... | Dr. Vincent Strudwick / ... (16 episodes, 1997-2001) |

| Chad Einbinder | ... | Rico / ... (15 episodes, 1997-2001) |
 | John Platt | ... | Man / ... (7 episodes, 1996-2000) |

| Jim Beaver | ... | Happy Doug (7 episodes, 1998-1999) |
 | Blake Soper | ... | Elman (6 episodes, 1997-1999) |

| Marianne Muellerleile | ... | Lucy (6 episodes, 1998-1999) |

| Michael Milhoan | ... | Coach Strickland (5 episodes, 1996-1998) |

| Richard McGonagle | ... | Dr. Howard (5 episodes, 1996-1999) |

| Steve Larson | ... | Larry (5 episodes, 1997-1998) |

| William Shatner | ... | Stone Phillips / ... (5 episodes, 1999-2000) |
 | Bruce Ed Morrow | ... | Father Rice (4 episodes, 1996-1997) |

| Justin Urich | ... | Romano (4 episodes, 1997-1998) |

| Jennifer Rhodes | ... | Mrs. Sumner (4 episodes, 1996) |
 | John D'Aquino | ... | Kevin Randall (4 episodes, 1996) |
 | Jim O'Doherty | ... | Clem / ... (4 episodes, 1997-1998) |
 | Christine Zander | ... | Christine Zander / ... (4 episodes, 1996-2000) |

| Chip Chinery | ... | The Maintenance Guy (4 episodes, 1997-1999) |

| John Cleese | ... | Dr. Liam Neesam (4 episodes, 1998-2001) |
 | Harry Morgan | ... | Professor Suter (3 episodes, 1996-1997) |

| Marijane Cole | ... | Lady on Phone / ... (3 episodes, 1996-2000) |

| Dan Gilvezan | ... | Disc Jockey / ... (3 episodes, 1996-2001) |

| Dee Freeman | ... | Waitress / ... (3 episodes, 1996) |
 | Patrick Kerr | ... | Irving (3 episodes, 1997-1998) |
 | Nancy Yee | ... | Mrs. DeGuzman (3 episodes, 1997-1998) |

| Pat Finn | ... | Chaz / ... (3 episodes, 1998-2001) |
 | Douglas Maida | ... | Axe Man VO / ... (3 episodes, 1998-2001) |
 | Jill Matson | ... | Ginger / ... (3 episodes, 1998-2001) |

| Jeff Doucette | ... | Chet (3 episodes, 1998) |

| Laurie Metcalf | ... | Jennifer Ravelli (3 episodes, 1998) |
 | Shane Powers | ... | Man / ... (3 episodes, 2000-2001) |

| Chyna | ... | Janice (3 episodes, 2000) |

| Ana Gasteyer | ... | Herself / ... (3 episodes, 2000) |
 | Mike Ditka | ... | Coach Mafferty / ... (2 episodes, 1996-1997) |

| Dennis Rodman | ... | Himself (2 episodes, 1996) |

| Bodhi Elfman | ... | Clerk / ... (2 episodes, 1996-1997) |

| Jim Pirri | ... | Antonio / ... (2 episodes, 1997) |
 | Kevin Scannell | ... | Dr. Goldberg (2 episodes, 1997) |

| Brenda Strong | ... | Miss Frost / ... (2 episodes, 1996-1997) |

| Richard Fancy | ... | Judge DeBelko / ... (2 episodes, 1997) |
 | Anna Slotky | ... | Cheryl (2 episodes, 1996-1997) |
 | Randy Newman | ... | Himself (2 episodes, 1997) |

| John Aylward | ... | Chancellor / ... (2 episodes, 1996-2000) |

| Lori Hall | ... | Assistant / ... (2 episodes, 1997-1999) |

| Bart McCarthy | ... | Grouch / ... (2 episodes, 1996-1997) |
 | Mike Schiff | ... | Dance Judge #1 / ... (2 episodes, 1996-2000) |

| Eddie Allen | ... | Dr. Bankson (2 episodes, 1996-1998) |

| Phil Hartman | ... | Phillip / ... (2 episodes, 1996-1998) |

| Rex Linn | ... | Chuck / ... (2 episodes, 1996-1997) |

| James Earl Jones | ... | Narrator (2 episodes, 1996) |

| Elaine Stritch | ... | Martha Albright (2 episodes, 1997-2001) |
 | George Grizzard | ... | George Albright (2 episodes, 1997-1998) |

| Sam Lloyd | ... | Eddie (2 episodes, 1997-1998) |

| David Bickford | ... | Professor #1 (2 episodes, 1997) |
 | Brandi Brown | ... | Professor #2 (2 episodes, 1997) |
 | Jason Carter | ... | Seth (2 episodes, 1997) |
 | Matthew Fonda | ... | Professor #3 (2 episodes, 1997) |
 | Don Gettinger | ... | Professor #4 (2 episodes, 1997) |

| Roseanne | ... | Janet (2 episodes, 1997) |
 | Lee Ryan | ... | Minister (2 episodes, 1997) |
 | Spencer Vrooman | ... | Dukes (2 episodes, 1997) |

| Terry Rhoads | ... | Bill / ... (2 episodes, 1998-2001) |

| Bill Chott | ... | Fred (2 episodes, 1998-1999) |

| Nicolas Coster | ... | Chancellor Stevens / ... (2 episodes, 1998-1999) |

| Tim Haldeman | ... | Mr. Kraft (2 episodes, 1998-1999) |

| Peter Jurasik | ... | Principal Greschner (2 episodes, 1998-1999) |

| Diana Castle | ... | Saleswoman (2 episodes, 1998) |
 | Jourdain Chapdelaine | ... | Perky Idiot #1 (2 episodes, 1998) |

| Frank Clem | ... | Waiter (2 episodes, 1998) |

| Cindy Crawford | ... | Mascha (2 episodes, 1998) |

| Shireen Crutchfield | ... | Kirsta (2 episodes, 1998) |

| Sonya Eddy | ... | Ticket Taker (2 episodes, 1998) |

| Angie Everhart | ... | Chloe (2 episodes, 1998) |
 | Al Foster | ... | Security Guard #2 (2 episodes, 1998) |
 | Greg Gumbel | ... | Himself (2 episodes, 1998) |
 | Brynn Hartman | ... | Venusian #1 (2 episodes, 1998) |

| Roger Hewlett | ... | Security Guard #1 (2 episodes, 1998) |
 | Beverly Johnson | ... | Prell (2 episodes, 1998) |

| Jennifer Lee Keyes | ... | Venutian Girl (2 episodes, 1998) |
 | Alex Kubik | ... | Counterman (2 episodes, 1998) |
 | Irina Pantaeva | ... | Gabriella (2 episodes, 1998) |
 | Shonda Whipple | ... | Perky Idiot #2 (2 episodes, 1998) |

| Jonathan Palmer | ... | Guest #1 / ... (2 episodes, 1999-2001) |
 | Kevin Ruf | ... | New Father / ... (2 episodes, 1999-2000) |

| David Chisum | ... | Chip Caswell (2 episodes, 1999) |

| Kim Johnston Ulrich | ... | Dorothy Strudwick (2 episodes, 1999) |

| Laura Wernette | ... | Tasha (2 episodes, 1999) |

| Paul Connor | ... | Student #3 (2 episodes, 2000) |

| Angell Conwell | ... | Girl #1 (2 episodes, 2000) |

| Lane Davies | ... | Chancellor Duncan (2 episodes, 2000) |
 | Darrell Hammond | ... | Himself (2 episodes, 2000) |

| Jade Harlow | ... | Student #4 (2 episodes, 2000) |

| Brian Palermo | ... | Mr. Barnes / ... (2 episodes, 2000) |
 | Shiloh Strong | ... | Student #2 (2 episodes, 2000) |
 | Scott Torrence | ... | Student #1 (2 episodes, 2000) |

| Elvis Costello | ... | Himself (2 episodes, 2001) |

| Maurice Godin | ... | Marty (2 episodes, 2001) |
 | Carlos Jacott | ... | Doctor / ... (2 episodes, 2001) |
 | Mindy Spence | ... | Sam / ... (2 episodes, 2001) |
|
| Bill Martin | .... | executive producer / supervising producer / ... (119 episodes, 1996-2000) |
| Mike Schiff | .... | executive producer / supervising producer / ... (119 episodes, 1996-2000) |
| Tim Ryder | .... | co-producer / associate producer (72 episodes, 1996-1998) |
| Marcy Carsey | .... | executive producer (62 episodes, 1996-2001) |
| Caryn Mandabach | .... | executive producer (62 episodes, 1996-2001) |
| Bonnie Turner | .... | executive producer (61 episodes, 1996-2001) |
| Tom Werner | .... | executive producer (61 episodes, 1996-2001) |
| Terry Turner | .... | executive producer (60 episodes, 1996-2001) |
| Patrick Kienlen | .... | producer (55 episodes, 1996-2000) |
| Bob Kushell | .... | producer / co-executive producer / ... (55 episodes, 1996-2000) |
| Christine Zander | .... | producer / co-executive producer / ... (53 episodes, 1996-2001) |
| David Sacks | .... | co-executive producer / executive producer (53 episodes, 1996-2000) |
| David Goetsch | .... | supervising producer / producer / ... (31 episodes, 1998-2001) |
| Jason Venokur | .... | supervising producer / producer / ... (31 episodes, 1998-2001) |
| David Israel | .... | supervising producer / producer / ... (29 episodes, 1998-2000) |
| Jim O'Doherty | .... | supervising producer / producer / ... (28 episodes, 1998-2000) |
| Patricia Valenzuela | .... | associate producer (20 episodes, 1999-2001) |
| Terry Hughes | .... | consulting producer (18 episodes, 1999-2001) |
| Aron Abrams | .... | co-producer / producer (17 episodes, 1999-2001) |
| Andrew Orenstein | .... | producer / co-producer (16 episodes, 1998-1999) |
| Gregory Thompson | .... | co-producer (16 episodes, 1999-2000) |
| Mark Brazill | .... | consulting producer / executive producer (14 episodes, 1997-1998) |
| Michael Glouberman | .... | producer / co-producer (14 episodes, 1998-1999) |
| Nastaran Dibai | .... | consulting producer / co-executive producer (11 episodes, 1999-2001) |
| Jeffrey B. Hodes | .... | consulting producer / co-executive producer (10 episodes, 1999-2001) |
| Joe Fisch | .... | co-executive producer (2 episodes, 1996) |
|
| Linwood Boomer | .... | executive producer (unknown episodes) |
| |
|
| Jeffrey Wheat | .... | technical coordinator / technical consultant (43 episodes, 1996-2001) |
| Will Forte | .... | story editor / executive story editor (42 episodes, 1999-2001) |
| Linda Parker | .... | production assistant / assistant to producers / ... (41 episodes, 1996-2000) |
| Daliah Rogow Nichols | .... | production executive (41 episodes, 1997-2001) |
| Gregg Mettler | .... | executive story editor / story editor / ... (36 episodes, 1997-2000) |
| Hayden Ghaffary | .... | script supervisor (35 episodes, 1998-2001) |
| Mona Nash | .... | production assistant / assistant: Audio Motion, UK (35 episodes, 1998-2001) |
| Dave Boerger | .... | assistant to writers (35 episodes, 1998-2000) |
| Leslie Rylke | .... | production assistant (35 episodes, 1998-2000) |
| Valerie Watson | .... | assistant to writers (33 episodes, 1998-2000) |
| Natasha Goldstone | .... | production staff / production assistant (30 episodes, 1998-2000) |
| Laura Black | .... | production assistant / assistant to producers (24 episodes, 1996-1999) |
| Gil Goldberg | .... | production assistant / assistant to producers (24 episodes, 1996-1999) |
| Melanie Patterson | .... | production coordinator / assistant to producers / ... (23 episodes, 1997-1999) |
| Chris Atwood | .... | assistant to writers (21 episodes, 1998-1999) |
| Mark Brazill | .... | creative consultant (19 episodes, 1996) |
| Sallie Houston | .... | assistant: Audio Motion, UK (19 episodes, 1999-2001) |
| Melodie Moore | .... | assistant: Audio Motion, UK (19 episodes, 1999-2001) |
| Sean Veder | .... | production coordinator / assistant to producer / ... (17 episodes, 1996-1999) |
| Katy Penland | .... | assistant to writers / assistant to writer (17 episodes, 1999-2001) |
| Terry Hughes | .... | executive consultant (16 episodes, 1998-1999) |
| Orit Schwartz | .... | production coordinator (16 episodes, 1999-2000) |
| Mike Doto | .... | production staff (9 episodes, 1999) |
| David Goetsch | .... | story editor / executive story editor (7 episodes, 1997-1998) |
| Mark Romano | .... | assistant to producers / production assistant (7 episodes, 1997-1998) |
| Jason Venokur | .... | story editor / executive story editor (7 episodes, 1997-1998) |
| Julie Sherman Wolfe | .... | story editor (7 episodes, 1999-2000) |
| Katy Ballard | .... | assistant to writers (6 episodes, 1996-1997) |
| Sandra Pearson | .... | script supervisor (5 episodes, 1996-1997) |
| Tony Gonzalez | .... | choreographer (4 episodes, 1996) |
| Denise Downer | .... | assistant to writers (4 episodes, 1997) |
| Michael Glouberman | .... | executive story editor (4 episodes, 1997) |
| David Israel | .... | executive story editor (4 episodes, 1997) |
| Jim O'Doherty | .... | executive story editor (4 episodes, 1997) |
| Andrew Orenstein | .... | executive story editor (4 episodes, 1997) |
| Christina Nelson | .... | production assistant (4 episodes, 2000) |
| Marcia Gould | .... | script supervisor (3 episodes, 1998) |
| Dave Jeser | .... | story editor (3 episodes, 2000-2001) |
| Jennifer Keene | .... | assistant to writer / assistant to writers (3 episodes, 2000-2001) |
| Christina Nelson Visosky | .... | production assistant (3 episodes, 2000-2001) |
| Matthew Silverstein | .... | story editor (3 episodes, 2000-2001) |
| Joshua Sternin | .... | executive consultant (2 episodes, 1998) |
| Jeffrey Ventimilia | .... | executive consultant (2 episodes, 1998) |
| Marguerite Pomerhn Derricks | .... | choreographer (2 episodes, 1999-2000) |
| Erik Durbin | .... | assistant to writers (2 episodes, 2001) |
| Dina Marovich | .... | assistant: Audio Motion, UK (2 episodes, 2001) |
|
| James Anderson | .... | publicist (unknown episodes) |
| Adam Buchsbaum | .... | production staff (unknown episodes) |
| Doug J. Campbell | .... | technical coordinator (unknown episodes) |
| Andy Cowan | .... | executive story consultant (unknown episodes) |
| John Davidson | .... | production staff (unknown episodes) |
| Jaime Fowler | .... | consultant: avid (unknown episodes) |
| Artemisa Gutierrez | .... | publicist (unknown episodes) |
| Shaun Newton | .... | production assistant (unknown episodes) |
| Jackie Oberhauser | .... | production staff (unknown episodes) |
| Nicole Sacker | .... | production coordinator (unknown episodes) |
| Diann Shaw | .... | publicist (unknown episodes) |
| Eli Shtrum | .... | production staff (unknown episodes) |
| Kenneth Lee Wright | .... | production staff (unknown episodes) |
| |