"EVERY CITY HAS ITS DANGEROUS YOUTH. Stark, explosive drama - as the camera lays bare the heart of a big city and probe the secrets of its Violent Playground."
A Liverpool juvenile liaison officer struggles with a young and dangerous pyromaniac.
Detective Sergeant Jack Truman

Cathie Murphy

Johnnie Murphy

Father Laidlaw

Sgt. Walker

Headmaster Evans

Superintendent

Chief Inspector

Mary Murphy
Patrick Murphy
Alexander

Primrose

Slick

Meg
Tommy

Mrs. Catlin

David Catlin
Mrs. Baker
Jilly Baker
Boy (uncredited)
Customer in Grocer's Shop (uncredited)

Police Sergeant (uncredited)
Pageboy at Hotel (uncredited)

(uncredited)
Police Officer in Patrol Car (uncredited)
William (uncredited)
(uncredited)
Child (uncredited)
Kid in Johnnie's Gang (uncredited)

Police Sergeant (uncredited)
(uncredited)
Child (uncredited)
Police Constable (uncredited)

(uncredited)
(uncredited)
Doorman at Grand Hotel (uncredited)
Stallholder (uncredited)

(uncredited)
Maureen Owen

(uncredited)
Hairdresser (uncredited)

Mechanic (uncredited)
Spectator at Fire (uncredited)
(uncredited)
(uncredited)
(uncredited)
Police Sergeant (uncredited)
(uncredited)
Constable (uncredited)
(uncredited)
(uncredited)
Unknown Role