The head of the Human Aetiological Relations Machine pits an agent against a flesh-to-fungus spore gun.
| Actor | Role |
|---|---|
 Peter Mark RichmanAdam Chance | Adam Chance |
 Wendell CoreyJim Graff | Jim Graff |
 Carl EsmondProfessor Jan Stefánik | Professor Jan Stefánik |
 Barbara BouchetAva Vestok | Ava Vestok |
 Martin KosleckBasil Malko | Basil Malko |
 Aliza GurMid-Eastern Contact | Mid-Eastern Contact |
 Donna MichelleMarian | Marian |
 Rafael CamposLuis | Luis |
 Robert QuarryBorg | Borg |
 Robert DonnerMorgue Attendant | Morgue Attendant |