Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
A look at when there are no eye-witnesses to murder, photographic evidence can provide investigators with a permanent record of the killer. S6/Ep17
Police arrest two conspirators in a plot to kill a woman, but in a dark twist, they accuse the victim's ex-husband of hiring them to kill his ex-wife. S7/Ep87
When killers sedate their victims and disguise the crime scene, identifying the true cause of death is hard. What hard evidence is needed to help investigators? S7/Ep88
A victim's estranged spouse is often a key witness in a murder investigation, and when the body is found, family and friends can provide crucial information. S7/Ep89
A vicious serial killer drinks the blood of his victims. FBI agent Robert Ressler builds a psychological profile to help catch this murderer. S1/Ep4
Sometimes, when a death seems to be accidental, it is up to forensic scientists to reveal hidden betrayals that reclassify cases from accidents to homicides. S7/Ep90
Psychologists discuss the behaviour of serial killers, including Ted Bundy, Aileen Wuornos and Canada's Paul Bernardo. S2/Ep1
Killers have many ways to dispose of their victim's remains, but these are often no match for investigators. S2/Ep2
It is the insignificant details that forensic experts use to recreate a crime and catch a killer - fibres from a carpet, a lost eyelash or a clothing fragment. S2/Ep3
When a young woman is found raped and strangled, the race is on to stop a serial killer. Plus, an ex-cop claims his wife shot herself - is he telling the truth? S8/Ep4
Discover how a few milligrams of forensic evidence can be crucial to a crime investigation and prove the innocence or guilt of the accused. S3/Ep1
Exploring the mind of the obsessive murderer, following the work of psychologists as they study the muddled workings of the criminal psyche. S3/Ep2
Hiding a body can be tricky - it's sometimes easier to obscure the circumstances of death, turning murder into suicide or blaming it on someone else. S3/Ep4
Everyday substances can reveal hidden clues that break a homicide case. One case is disproved when cyanide is found in a woman's blood stream. S7/Ep91