An American journalist stationed in Japan is given a mysterious injection by a mad scientist, turning him into a murderous, two-headed monster.
| Actor | Role |
|---|---|
 Peter DyneleyLarry Stanford | Larry Stanford |
 Jane HyltonLinda Stanford | Linda Stanford |
 Tetsu NakamuraDr. Robert Suzuki | Dr. Robert Suzuki |
 Terri ZimmernTara | Tara |
| NNorman Van HawleyIan Matthews | Ian Matthews |
 Jerry ItōPolice Supt. Aida | Police Supt. Aida |
| TToyoko TakechiEmiko Suzuki | Emiko Suzuki |
| AAlan TarltonDr. H.B. Jennsen | Dr. H.B. Jennsen |
| FFujie SatsukiOld woman in hotel | Old woman in hotel |