When a brilliant yet obsessive surgeon, cast out by the medial community, takes science to a shocking new level - by grafting the head of one man onto the body of another - his terrifying two-headed creation escapes the lab and goes on a rampage!
| Actor | Role |
|---|---|
 Bruce DernRoger | Roger |
 Pat PriestLinda | Linda |
 Casey KasemKen | Ken |
 Albert ColeCass | Cass |
| JJohn BloomDanny | Danny |
 Berry KroegerMax | Max |
| LLarry VincentAndrew | Andrew |
| JJack LesterSheriff | Sheriff |
| JJerry PattersonDeputy | Deputy |
| DDarlene DuraliaMiss Pierce | Miss Pierce |
| RRaymond ThorneMotorcyclist | Motorcyclist |
 Gary KentMotorcyclist | Motorcyclist |
| MMary Ellen ClawsenMotorcyclist | Motorcyclist |
| JJanice P. GelmanTeenager | Teenager |
| MMike EspeTeenager | Teenager |
| AAndrew SchneiderTeenager | Teenager |
| EEva SorensenTeenager | Teenager |
| BBill CollinsHighway Patrolman | Highway Patrolman |
| JJack EnglishHighway Patrolman | Highway Patrolman |
| RRobert MillerStation Attendant | Station Attendant |
| LLaura LanzaNurse | Nurse |
| CCarolyn GilbertNurse | Nurse |
| LLeslie ColeDanny as a Young Boy | Danny as a Young Boy |