"Paying the Price" – Rendered homeless by his own carelessness after burning his house down, Frost takes on a kidnapping case with the help of WPC Claire Toms. A 24-hour operation at the victim's flat leads to escalating demands from the kidnapper and even Frost finds it difficult to keep cool under the pressure.

"Unknown Soldiers" – Frost finds himself staring down the barrel of a gun when he interviews a suspected drug dealer and then finds himself confronted by an armed robbery. But, he's far more intrigued by the death of a young soldier at an army camp. It's strictly off limits to police, but that has never stopped Frost before.

"Fun Times for Swingers" – Frost encounters the world of male escorts in this episode but he has a rude introduction when a naked woman throws herself from the roof of Denton Church. Frost uncovers a snapshot of a man with whom she had an affair, but the next day the man himself is found murdered.

"The Things We Do for Love" – The savage murder of a young physiotherapist sends Frost in pursuit of the names in her electronic organizer. The prime suspect is a pillar of the local church, but Frost's conviction that he is the killer is refuted by a water-tight alibi.

"Deep Waters" – Frost is determined to make two suspects confess after a vicious knife attack, but an adversarial solicitor points out that justice has to be done despite what Frost's instinct tells him. That aside, can he trust his hunch about a mysterious assailant at the local university... or not?

Episodes
Paying the Price
Unknown Soldiers
Fun Times for Swingers
The Things We Do for Love
Deep Waters