John Saxon as Norman Hopper

Elizabeth Turner as Jane Hopper

Giovanni Lombardo Radice as Charlie Bukowski

Cinzia De Carolis as Mary

Tony King as Tom Thompson

Wallace Wilkinson as Captain McCoy

May Heatherly as Helen

Ramiro Oliveros as Dr. Phil Mendez

Venantino Venantini as Lieutenant Hill

Renzo Pevarello as Hospital Assistant

Walter Patriarca as Mr. Philipps, Jane Hopper's guest at TV Station (uncredited)

John Geroson as Policeman

Ronnie Sanders as Orderly

Vic Perkins as Biker

Jere Beery as Biker Leader

Joan Riordan as Aunt Tina

Laura Dean as Brunette Jogger

Lonnie R. Smith Jr. as Biker

Don Ruffin as Biker Carlos

Benjamin Rogers as Biker

Bill Gribble as Doctor in Ambulance

George Nikas as Biker

Doug Dillingham as Cop at Flea Market

Ralph Pruitt Vaughn as Actor

Edoardo Margheriti as Police Officer (uncredited)

Luca Venantini as Bobby (uncredited)

Goffredo Unger as Mall Guard (uncredited)

Renzo Marignano as Dr. Morris (uncredited)

Paul Costello as Newscaster (uncredited)

Taso N. Stavrakis as Citizen (uncredited)

Fernanda Dell'Acqua as Burning Woman (uncredited)

Sergio Testori as Policeman in Sewers (uncredited)

Nazzareno Zamperla as U.S. Army Soldier (uncredited)