Five Dolls for an August Moon (1970)

The Island of Terror!

Cast

Ira von Fürstenberg, Edwige Fenech, Howard Ross, Helena Ronee, Teodoro Corrà

Overview

A wealthy playboy gathers a group of bourgeois friends at his isolated beach house for a weekend of relaxation. When bodies start pilling up, they realize they’re trapped with a killer in their midst, sending them in a frenzy to figure out who amongst them is killing the others before they are killed next.