| Actor | Character | No. of Appearances |
| Laura Harris | |
| Carlos Bernard | |
| Eric Balfour | |
| Vicellous Shannon | |
| Sarah Clarke | |
| Zachary Qunito | |
| Nester Serrano | |
| Penny Johnson Jerald | |
| John Allen Nelson | |
| Rena Sofer | |
| TJ Ramini | |
| Lourdes Benedicto | |
| Jean Smart | |
| Stephen Spinella | |
| Chris Diamantopoulos | |
| Louis Lombardi | |
| Jayne Atkinson | |
| Freddie Prinze Jr. | |
| Colm Feore | |
| Xander Berkeley | |
| Mido Hamada | |
| Daniel Bess | |
| Jeanene Garofalo | |
| Arnold Vosloo | |
| Gregory Itzin | |
| Annie Wersching | |
| Michelle Forbes | |
| James Badge Dale | |
| James Frain | |
| Michael Massee | |
| Tzi Ma | |
| | Actor | Character | No. of Appearances |
| Elisha Cuthbert | |
| Shohreh Aghdashloo | |
| Leslie Hope | |
| D.B. Woodside | |
| Sandrine Holt | |
| Peter Weller | |
| Peter MacNicol | |
| Jonathan Ahdout | |
| Kim Raver | |
| William Devane | |
| Roger Cross | |
| Nick Jameson | |
| Anil Kapoor | |
| Jeffrey Nordling | |
| Ċ½eljko Ivanek | |
| Carlo Rota | |
| Paul Blackthorne | |
| Jude Ciccolella | |
| Adoni Maropis | |
| Daniel Dae Kim | |
| Ricky Schroder | |
| James Cromwell | |
| Mykelti Williamson | |
| Rhys Coiro | |
| Hakeem Kae-Kazim | |
| Frank John Hughes | |
| Vanessa Ferlito | |
| Kiefer Sutherland | |
| Mia Kirshner | |
| Julian Sands | |
| Cherry Jones | |
| | Actor | Character | No. of Appearances |
| Powers Boothe | |
| Marisol Nichols | |
| Joaquim de Almeida | |
| Nazneen Contractor | |
| Glenn Morshower | |
| Geoff Pierson | |
| John Terry | |
| James Morrison | |
| Sprague Grayden | |
| Alberta Watson | |
| Kari Matchett | |
| Dennis Hopper | |
| Lana Parrilla | |
| Jon Voight | |
| Phillip Rhys | |
| Evan Ellingson | |
| Dennis Haysbert | |
| Katie Sackhoff | |
| Karina Arroyave | |
| Bob Gunton | |
| Reiko Aylesworth | |
| Necar Zadegan | |
| John Boyd | |
| Vincent Laresca | |
| Jesse Borrego | |
| Paul Schulze | |
| Mary-Lynn Rajskub | |
| Christina Chang | |
| Sarah Wynter | |
|