| David Duchovny | Fox Mulder |
| Gillian Anderson | Dana Scully |
| John O'Hurley | Dr. Pollidori |
| Pattie Tierce | Shaineh Berkowitz |
| Stewart Gale | Izzy Berkowitz |
| Chris Giacoletti | Booger |
| Chris Owens | Mutato |
| Dana Grahame | Reporter |
| Jean-Yves Hammel | Goat Boy |
| Tracey Bell | Cher |
| Lloyd Berry | Old Man Pollidori |
| Miriam Smith | Elizabeth Pollidori |
| Xantha Radley | Waitress |
| C. Ernst Harth | Huge Man |
| Jerry Springer | Jerry Springer |
| Vitaly Kravchenko | J.J.
(uncredited) |
| Andrew Laurenson | Nerdy Student
(uncredited) |
| Earl Maddox | Hazmat Team Member
(uncredited) |
| Jonathan Palis | Postal Worker
(uncredited) |
| Geoff Redknap | Puppeteer
(uncredited) |
| Reginald Colin Rowley | Towns Folk
(uncredited) |
| Laurie Soper | Towns Folk
(uncredited) |
| Clarence Sponagle | Concertgoer
(uncredited) |