| As seen in season(s): | Name | Actor |
| 1-5 | |
| 1-5 | |
| 1-4, guest star in season 5 | |
| 1-2, guest star in later seasons | |
| 1-2, guest star in later seasons | |
| recurring role in seasons 1, 2, and 4 | |
| recurring role in seasons 1, 4, and 5 | |
| 1-5 | |
| recurring role in seasons 1-3 | |
| 1-5 | |
| 1-5 | |
| | As seen in season(s): | Name | Actor |
| 3-4, recurring role before and afterwards | |
| 2-3, recurring role before and afterwards | |
| 2, guest star in later seasons | |
| 3 | |
| Guest role in seasons 1 and 3 | |
| 4, recurring role before and afterwards | |
| 5 | |
| 5 | |
| 5 | |
| 5, recurring role before | |
|