| Steve Martin | Dr. Michael Hfuhruhurr |
| Kathleen Turner | Dolores Benedict |
| David Warner | Dr. Alfred Necessiter |
| Paul Benedict | Butler |
| Richard Brestoff | Dr. Pasteur |
| James Cromwell | Realtor |
| George Furth | Timon |
| Peter Hobbs | Dr. Brandon |
| Earl Boen | Dr. Felix Conrad |
| Bernie Hern | Gun Seller |
| Director | Carl Reiner |
| Producer | William E. McEuen; David V. Picker |
| Writer | George Gipe; Steve Martin |
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