"During summer vacation on Fire Island, three young people become very close. When an uncool girl tries to infiltrate the trio's newly found relationship, they construct an elaborate plot that has violent results."
Barbara Hershey
as Sandy
Richard Thomas
as Peter
Catherine Burns
as Rhoda
Bruce Davison
as Dan
Ernesto Gonzalez
as Anibal
Conrad Bain
as Sidney (uncredited)
Lou Gary
as Town Hood (uncredited)
Eileen Letchworth
as Dan's mother (uncredited)
Peter Turgeon
as Mr. Caudell (uncredited)
Ralph Waite
as Peter's father (uncredited)
Andrew Krance
Wayne Mayer
Maeve McGuire
as Younger Woman (uncredited)
Ed Stevlingson
Lydia Wilen
as Waitress (uncredited)
Frank Perry
Director
Evan Hunter
Novel
Peter Dohanos
Art Direction
John Simon
Original Music Composer
Enrique Bravo
Director of Photography
Alfred W. Crown
Producer
Marion Kraft
Editor
Sidney Katz
Emanuel L. Wolf
Eleanor Perry
Screenplay
Sidney Beckerman
Gerald Hirschfeld
Phillip M. Goldfarb
Production Manager
Julia Tucker
Script Supervisor
Ron Zarilla
Second Assistant Camera
Mitch Eskie
Location Assistant
Dan Sable
Sound Editor
Nathan Boxer
Sound
Terence A. Donnelly
Assistant Director
Charles Federmack
Joel Glickman
Associate Producer
Co-Producer
Theoni V. Aldredge
Costume Design