David Jason stars as fiercely independent but deeply compassionate Detective Inspector "Jack" Frost in the five 120-minute mysteries comprising season four of A Touch of Frost. Frost's professional travails literally hit home when his house is torched in "Paying the Price," giving him way too much on his mind while he tries to track down a motorcycle-riding kidnapper and his latest victim. "Unknown Soldiers" is all about the improper use of firearms, with Frost, a soldier, and a security cop all finding themselves on the business end of various illicitly purchased guns. The public suicide of a naked woman and the death of a local Lothario leads Frost to a cricket pavilion frequented by his dyspeptic boss, Supt. Mullett (Bruce Alexander), in "Fun Times for Swingers." Next, "The Things We Do For Love" finds Frost conducting a murder investigation in a strange religious compound. And last but not least, "Deep Waters" obliges Frost to seek out a link between the murder of a postal worker and the vicious assault on a beautiful psychology student -- and beyond that, a long-unsolved death outside Frost's current jurisdiction.