Mistaken identity: Jack’s got a new love interest. A body with no identification is found in a local reservoir. The investigation of a brutal murder of a couple leads to a worker in their home.

Hidden truth: Jack misplaces his winning lottery ticket. A murder witness is holed up in secrecy until a hit-man hired to eliminate her finds the safe house. Frost is determined to expose a traitor among the ranks.

Close encounters: Did aliens kill a security guard at Denton Quarry? With newborn in tow, Detective Sergeant Hazel Wallace helps Frost investigate a string of burglaries. The father of a missing child gives police an unconvincing alibi.

Held in trust: Frost dreads a potential promotion to a desk job. When a child disappears, is it a case of foul play or runaway? A child molester is on the loose in Denton.