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)

Anthony Sagar

Fenton (uncredited)

Peter Kriss

Scott (uncredited)

Peter Madden

Mr. Smith (uncredited)

Dallas Cavell

Lord Jaspers (uncredited)

James Cairncross

Mr. Jones (uncredited)

Frank Finlay

Booking Office Clerk (uncredited)

Robert Percival

Tory Politician (uncredited)

Ray Austin

Harry Craig (uncredited)

Derek Fowlds

Borstal Inmate (uncredited)

Billy Murray

Borstal Inmate (uncredited)

Ernest Blyth

Army Officer at Sports Day (uncredited)

Jim Brady

Man in Cafe (uncredited)

John Bull

Ronalds (uncredited)

Peter Duguid

Doctor (uncredited)

Charles Dyer

Bit Part (uncredited)

Edward Fox

Extra (uncredited)

Brian Hammond

Johnny Smith - Colin's Brother (uncredited)

William Ash Hammond

Johnny Smith - Colin's Brother (uncredited)

Victor Harrington

Army Officer at Sports Day (uncredited)

Aileen Lewis

Sports Day Spectator (uncredited)

Fred Machon

Borstal Master at Meeting (uncredited)

Philip Martin

Stacy (uncredited)

Anita Oliver

Alice Smith - Colin's Sister (uncredited)

Christopher Parker

Bill Smith - Colin's Brother (uncredited)

Joe Phelps

Borstal Master in Workshop (uncredited)

Corin Redgrave

Spectator at Sports Day (uncredited)

Doug Robinson

Prison Warder (uncredited)

Robert Vossler

Plainclothes Policeman (uncredited)

John Wilder

Ranley Headmaster (uncredited)

Chris Williams

Ranley Boy (uncredited)