Maniac

Joe Spinell

Frank Zito

Caroline Munro

Anna D'Antoni

Abigail Clayton

Rita

Nelia Bacmeister

Carmen Zito

Denise Spagnuolo

Denise

Billy Spagnuolo

Billy

Kelly Piper

Nurse

Sharon Mitchell

Second Nurse

Rita Montone

Hooker

Hyla Marrow

Disco Girl

Tom Savini

Disco Boy

Linda Lee Walter

Beach Girl

James Brewster

Beach Boy

Tracie Evans

Street Hooker

Carol Henry

Deadbeat

Louis Jawitz

Art Director

Candace Clements

First Park Mother

Diane Spagnuolo

Second Park Mother

Kim Hudson

Lobby Hooker

Terry Gagnon

Woman in Alley

Joan Baldwin

First Model

Jeni Paz

Second Model

Janelle Winston

Waitress

Randy Jurgensen

First Cop

Jimmy Aurichio

Second Cop

Frank Pesce

T.V. Reporter (voice)

Andrew W. Garroni

Jerry (uncredited)

Taso N. Stavrakis

Porn-o guy (uncredited)

William Lustig

Al - Hotel Manager (uncredited)