Rent A Touch of Frost: Series 7 (1999)

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.

Line of Fire
There's little in the way of Christmas cheer for Jack Frost as a regional Crime Squad detective is found murdered on his patch. The evidence points to police corruption but when Frost takes the lead in the subsequent investigation he soon comes head to head with the dead policeman's boss.