| Name | Character | Episodes |
|---|---|---|
| Giancarlo Esposito | Tim Sanders | 5 |
| Kari Matchett | Claudia Whitney | 5 |
| Timothy Hutton | J.T. Neumeyer | 5 |
| Nicole de Boer | Chantal Hume | 5 |
| Angus Macfadyen | Roy Bremmer | 5 |
| Hamish Linklater | Carl Axelrod | 5 |
| David McIlwraith | Brad Hume | 5 |
| Randy Quaid | Irwin Sikorski | 5 |
| Gage Golightly | Jesse Neumeyer | 5 |
| Rob Stewart | Dr. Dan Westville | 4 |
| Barbara Tyson | Mandy Murphy | 1 |
| Chilton Crane | Jan Westville | 1 |
| Juno Rinaldi | Toy store clerk | 1 |
| Brian McCaig | Student #1 | 1 |
| Ian Thompson | Bus driver | 1 |