DCS Walker and DCI Connor investigate some of the most gruesome murders to be seen on British telly.

It's no wonder they clash with each other as often as they do the suspects and victims in their disturbing cases.

A naked woman found dead in a suitcase is the starting point of the first of four two parters in this Fifth Collection.

They also investigate the murder of surgeon, a vigilante attack on a rundown estate and a pair of criminal brothers.

Viewing of the first two stories -- from the 2008 season -- shows that Trial & Retribution remains one of the most gripping and gritty UK crime series.

David Knights