In Texas, surveillance catches a killer out. In Washington State, a man's vlogs reveal his dark plans.

In the UK, a woman is found murdered after reporting stalking. In Texas, a woman is found shot dead outside her home.

In Florida, a teen girl is found murdered. In Colorado, a young woman goes missing.

In Colorado, a woman is found murdered after a tip-off. In Michigan, a young couple are found dead in a shed.

In the US, a grandmother goes missing. Surveillance footage captures last movements of a missing woman.

In the US, police search for a missing woman and her money. In the UK, a woman's murder sparks a manhunt.

This episode features a lover's quarrel and a murderer with a lot to hide.

A man and his accomplice go on a killing spree, leaving four dead. In the UK, a student is stabbed to death.

In the US, an elusive killer leaves a trail in blood and phone data.

In the U.K., a young woman fails to come home after a date; her worried family desperately searches for her, only to discover a devious attempt at a cover-up; in the U.S., a young mother is found dead in a house fire.