Cast / Details
| Rick Moranis | Wayne Szalinski |
| Lou Cutell | Dr. Brainard |
| Patrick Brown | (uncredited) |
| Janet Sunderland | Lauren Boorstein |
| Martin Aylett | Harold Boorstein |
| Laura Waterbury | Female Cop |
| Kimmy Robertson | Gloria Forrester |
| Mark L. Taylor | Donald 'Don' Forrester |
| Robert Oliveri | Nick Szalinski |
| Amy O'Neill | Amy Szalinski |
| Jared Rushton | Ronald 'Ron' Thompson |
| Kristine Sutherland | Mae Thompson |
| Marcia Strassman | Diane Szalinski |
| Craig Richard Nelson | Professor Frederickson (uncredited) |
| Frank Welker | (voice) |
| Carl Steven | Tommy Pervis |