(K)Nox: The Rob Knox Story

In 2008, 18-year-old Rob Knox was stabbed to death just days after filming his breakthrough role as Marcus Belby in Harry Potter and the Half-Blood Prince.

This emotional true crime documentary investigates the reasons behind his murder and features interviews with family members, friends and the Harry Potter cast including Jim Broadbent, Ray Winstone, Tom Felton, David Yates and Blake Harrison.