A Touch of Frost is a television detective series based on the Frost novels by R.D. Wingfield. It stars David Jason as Detective Inspector William Edward "Jack" Frost, known almost universally as Jack, an experienced and dedicated detective who frequently clashes with his superiors. (extract from Wikipedia)
Cantankerous detective Frost really grows on you. There are many dramatic scenes played so well by David Jason, that it's hard to believe he's the same actor who played Del Boy Trotter (hilariously) in Only Fools and Horses!!
With David Jason, Bruce Alexander, John Lyons, Arthur White. DI Jack Frost is an unconventional policeman with sympathy for the underdog and an instinct for moral justice. Sloppy, disorganized and disrespectful, he attracts trouble like a magnet.