London Kills Episodes Available now

Episode 5—Series 4

5/5 A parental revelation might be a murder motive, but a grudge derails David鈥檚 judgement.

4/5 Drinking links the end of a killed man鈥檚 marriage and his son's revenge attempt.

3/5 David doubts a fatal stabbing links to a local girl gang鈥檚 actions, but Billie disagrees.

2/5 A soldier鈥檚 suspicious demise reveals family lies and the consequences of an accident.

1/5 With Rob framed for murder, David鈥檚 gung-ho interference does more harm than good.

5/5 The squad pursue a suspect cop who has killed again and already selected his next victim.

4/5 A missing man turns up dead, and inconsistencies about his disappearance emerge.

3/5 Billie will not forgive a young man鈥檚 deadly past, even for her mother鈥檚 sake.

2/5 A murdered teenager's parents withhold information, unaware of unsavoury activity online.

1/5 A suspicious death has links to a killing still haunting Rob and David.