Because of the popularity of the "CSI" franchise in the United Kingdom, Channel 5 created two documentaries about CSI. The first one called "The Real CSI" follows real crime scene investigators as they work on crime scene. The second documentary, "True CSI", features true tales of how forensic science has helped solve some of the world's best known crimes. "True CSI" had actors re-enacting the crime as well as interviews with people involved in the solving of the crimes themselves. Cases featured included the Sam Sheppard case.