A photographer and his model are on a photo shoot in a forest when they get the feeling they are being watched. The feeling becomes so strong that they decide to cut their session short and leave. Later, when they develop the photos they took, they discover what looks like alien creatures in the background.
| Actor | Role |
|---|---|
 Robert HoffmannTony Harris | Tony Harris |
 Nathalie DelonMonica Stiles | Monica Stiles |
 Martin BalsamInspector Jim Grant | Inspector Jim Grant |
 Sherry BuchananKarin Hale | Karin Hale |
| VVictor ValenteColeman Perry | Coleman Perry |
 Sergio RossiLeader of 'The Silencers' | Leader of 'The Silencers' |
 Mario NovelliThe Silencers Henchman | The Silencers Henchman |
 Franco GarofaloPeter Collins | Peter Collins |
| GGiovanna De LucaNot listed | Not listed |
 Bruno Di LuiaThe Silencers Henchman | The Silencers Henchman |
 George ArdissonAgent for 'The Silencers' | Agent for 'The Silencers' |
 Franco BeltrammePhillips - Inspector Grant's Assistant | Phillips - Inspector Grant's Assistant |
 Tom FelleghyCommander Smith | Commander Smith |
 Cesare NizzicaFarmer | Farmer |
 Carlo HintermannAir Marshal Thompson | Air Marshal Thompson |