A Touch of Frost

Part one of a two‑part series sees David Jason, in his final turn as Jack Frost, joined by Phyllis Logan and Adrian Dunbar. In this opening episode they still together investigate the copycat killer and the murder of a teenager.

If Dogs Run Free – Part One is a televised programme presented in the format of an episode, forming the opening half of a two‑part story. It is positioned as the first instalment, setting the stage for the narrative that will conclude in the subsequent episode. The episode follows the seasoned detective Jack Frost as he tackles a disturbing series of crimes. Frost’s investigation centres on a copycat murderer whose methods echo earlier offences, while simultaneously probing the killing of a teenage victim. The dual focus on the mimicry of past crimes and the tragic loss of a young life drives the unfolding mystery, compelling Frost to piece together clues that link the two cases. This installment marks the final appearance of David Jason in the role of Jack Frost. He is accompanied on screen by Phyllis Logan and Adrian Dunbar, who join him as guest characters for this concluding chapter of his tenure. Their presence adds depth to the investigation, supporting Frost as he navigates the complexities of the copycat killer’s motives and the teenager’s murder, bringing the first half of the story to a compelling pause before the resolution in part two.