Silent Night: When a young woman is found murdered in her Oregon apartment on Christmas Day, investigators soon learn the terrifying truth about her killer. (S8, ep 8)
Absent Teacher: In 1993, a primary school teacher went missing after her first day at a new job. Over the next two months, investigators pieced together the sinister puzzle. (S7, ep 8)
Brute Force: In 1987, Kentucky police discovered the body of 20-year-old Corinna Mullen in the boot of her car. But it would be many years before the case could be solved. (S6, ep 8)
Manufacturing Murder: In December of 1997, the bodies of three men and a woman were discovered in a Florida manufacturing plant. Who killed them and why? (S5, ep 8)
Murder On The Menu: Detectives grill a host of suspects when they discover the dumped and dismembered body of a chef. Can forensics confirm his unlikely killer? (S4, ep 8)
Death Of An Angel: In 1992, 17-year-old Angel Ormston failed to return from a trip to the shops. Had she run away? Five months later, her family discovered the awful truth. (S3, ep 8)
Last Curtain Call: When a former actor is gunned down in Yuma, Arizona, police chase leads across the southwest until they finally get their man. (S8, ep 7)
No Good Deed: In 2005, a 28-year-old photographer and college student was found murdered in his Texas apartment. What could have led a killer to his door? (S7, ep 7)
Stone Cold Killer: In 2000, near Anchorage, Alaska, Genevieve Tetpon was found dead from a brutal attack. It wasn't until 2009 police finally made a breakthrough. (S6, ep 7)
Deathbed: Three decades after a man is found dead in mysterious circumstances in San Diego, forensic advances finally identify his highly unlikely killer. (S5, ep 7)