Rent A Touch of Frost: Series 9 (2002)

David Jason stars as Detective Inspector Jack Frost, an authority-flouting maverick who won't and doesn't abide by the rules and will stop at nothing to see justice done.

Mistaken Identity
Frost finds himself coming face to face with something unusual: a possible relationship. But as the relationship evolves so do the murders and with a psychotic killer on the loose Frost is finding this a little closer to home than he would have liked.