New Tricks

The team reopens a 15-year-old strangling case

DNA tests on a suspected robber prove his innocence but also reveal his father was an unnamed vagrant strangled on a tube train 15 years earlier. The team reopens the case, going in pursuit of the victim's other family members - including the man they believe to be his brother - while Brian questions the homeless community, only to fall foul of a gang of robbers. Peter Davison and Keith Allen guest star