Investigates the mysterious missing persons case of Nathalie Hemming, who went missing in May 2016. Her mother alerted the police within two days, triggering what became one of the biggest missing persons searches.

A book dealer is brutally stabbed to death, but with no witnesses or suspects, police have a tough time trying to catch his killer.

Thames Valley Police investigate the shooting death of teenager Suhaib Mohammed on a quiet street in Milton Keynes, finding suspects who can't seem to stop talking.

Thames Valley Police investigate when 64-year-old Hang Yin Leung dies after six men ransacked her home. It's one of the most difficult homicides they've investigated.