Colin Smith

Tom Courtenay

Ruxton Towers Reformatory Governor

Michael Redgrave

Mr. Smith

Peter Madden

Mrs. Smith

Avis Bunnage

Brown, House Master

Alec McCowen

Mike

James Bolam

Gladys

Julia Foster

Roach

Joe Robinson

Audrey

Topsy Jane

Detective

Dervis Ward

Gordon

Raymond Dyer

Willy Gunthorpe - Ranley School Runner (uncredited)

James Fox

Bosworth

John Thaw

Stacy (uncredited)

Philip Martin

Chief Borstal Officer

Arthur Mullard

Harry Craig (uncredited)

Ray Austin

Fenton

Anthony Sager

Green (uncredited)

John Brooking

Fenton (uncredited)

Anthony Sagar

Scott (uncredited)

Peter Kriss

Mr. Jones (uncredited)

James Cairncross

Lord Jaspers (uncredited)

Dallas Cavell

Doctor (uncredited)

Peter Duguid

Ronalds (uncredited)

John Bull

Booking Office Clerk (uncredited)

Frank Finlay

Gunthorpe

William Ash

Tory Politician (uncredited)

Robert Percival

Alice Smith - Colin's Sister (uncredited)

Anita Oliver

Borstal Inmate (uncredited)

Derek Fowlds

Johnny Smith - Colin's Brother (uncredited)

Brian Hammond

Bill Smith - Colin's Brother (uncredited)

Christopher Parker

Borstal Inmate (uncredited)

Billy Murray

Army Officer at Sports Day (uncredited)

Ernest Blyth

Man in Cafe (uncredited)

Jim Brady

Public School Boy

Christopher Williams

Bit Part (uncredited)

Charles Dyer

Extra (uncredited)

Edward Fox

Army Officer at Sports Day (uncredited)

Victor Harrington

Borstal Master at Meeting (uncredited)

Fred Machon

Spectator at Sports Day (uncredited)

Corin Redgrave

Prison Warder (uncredited)

Doug Robinson

Plainclothes Policeman (uncredited)

Robert Vossler

Ranley Headmaster (uncredited)

John Wilder