Beginning with a mysterious murder of a young girl, the third season opens its' doors with exciting stories following London detectives while they investigate crimes from the past; unraveling secrets left buried for years.
An emotionally intelligent script, sinuous narrative, pitch-perfect casting and a genuine interest in people: Unforgotten should be remembered for many years.
The key skill of a police procedural isn't always inventing new and horrible methods of slaughter or fetidly deviant predators: it's the storytelling that needs to be killer, and Unforgotten, for all its compassion, was merciless.
The odd couple are mismatched to the extent of being a perfect fit, and are in possession of such quantities of sexual chemistry that they are practically married.
The quality that most distinguishes Unforgotten from the general run of TV crime drama is the quiet seriousness and palpable humanity with which it treats the business of murder.