| Name | Character | Episodes |
|---|---|---|
| Ted Raimi | Self | 1 |
| Marta Kristen | Self | 1 |
| Sid Haig | Self | 1 |
| Caroline Williams | Self | 1 |
| Dave Attell | Self | 1 |
| Vernon Wells | Self | 1 |
| Kathleen Kinmont | Self | 1 |
| Terry Kiser | Self | 1 |
| Cassandra Peterson | Self | 1 |
| G. Larry Butler | Dr. Lazaroff | 1 |
| Richard Hatch | Self | 1 |
| Nancy Kyes | Self | 1 |
| Stephen Chiodo | Self | 1 |
| Chase Masterson | Self | 1 |
| Eileen Dietz | Self | 1 |
| Irwin Keyes | Self | 1 |
| Joel Hodgson | Self | 1 |
| Kyra Schon | Self | 1 |
| Larry Kenney | Self | 1 |
| Conrad Brooks | Self | 1 |
| Charles Chiodo | Self | 1 |
| Shadoe Stevens | OSI Announcer | 1 |
| Shadoe Stevens | OSI Announcer (voice) | 1 |
| Mark Allan Stewart | Self | 1 |
| Edward Chiodo | Self | 1 |
| Lee Demarbre | Self | 1 |