Michael Redgrave

Ruxton Towers Reformatory Governor

Tom Courtenay

Colin Smith

Avis Bunnage

Mrs. Smith

Alec McCowen

Brown, House Master

James Bolam

Mike

Joe Robinson

Roach

Dervis Ward

Detective

Topsy Jane

Audrey

Julia Foster

Gladys

James Fox

Willy Gunthorpe - Ranley School Runner (uncredited)

John Thaw

Bosworth (uncredited)

Arthur Mullard

Chief Borstal Officer (uncredited)

Philip Martin

Stacy (uncredited)

John Brooking

Green (uncredited)

Raymond Dyer

Gordon (uncredited)

Tony Richardson