A young mother dies after attending a local dance music festival; after it's established she has taken ecstasy, the team must investigate whether the drug was the primary cause of her death or if other factors played a significant role.
Dr. Adeley and his team investigate the deaths of an elderly woman who was discovered lifeless while on a stairlift and an apparently fit man who mysteriously fails to turn up for work.
A man in his 30s is found dead in a friend's apartment; police launch a Facebook appeal to identify him and trace his next of kin, while mortuary staff investigate the circumstances of his death.
When a woman's body is discovered in a hot bath, the pathologist works to determine the cause of death while police look into the possibility of foul play; in a separate incident, a decomposed body is found in Burnley.
John George Haigh dissolved his victims' bodies in acid and poured the sludge down the drain. Fred Dinenage investigates his gruesome murders in the 1940s London.