A man's church confession provides an insight into what appears to be a straightforward murder. But before Frost can make an arrest, he is suspended over the outcome of a related case 10 years earlier.

The episode was rated 7.62 from 47 votes.

A man is released on licence after serving 20 years for the murder of a 14-year-old girl. When the body of her best friend, who disappeared at the same time, is found, Frost has to investigate a 20-year-old murder.

The episode was rated 7.61 from 41 votes.

Hazel Wallace returns from her training, as the new Detective Sergeant, and is put to work by Supt Mullett sorting out the mess left behind by DI Frost, while he is on extended compassionate leave. Before long she is called upon, when a man is found hanged in his home, and she suspects it was not suicide. Routine investigations show that a fresh set of fingerprints at the scene belong to an unidentified man who had been found drowned a year previously. Frost is summoned back by Supt Mullett to sort things out, and he connects a painting that appears to have been stolen from the hanged man with an art robbery & murder some years before.

The episode was rated 7.58 from 53 votes.

An 8-year-old girl is missing, and the last person to have seen her is Billy Conrad, a gentle young man with Down's syndrome, but who appears is hiding something.

The episode was rated 7.58 from 55 votes.

Frost investigates two deaths: a homeless teenage girl, found beaten up and drowned in Denton's river; and that of an environmental health officer, after a dismembered arm is washed up on the shoreline. This leads to the investigation of a local meat processing factory.

The episode was rated 7.55 from 44 votes.

Frost's Christmas is overshadowed by a local power station worker falling to his death in a mysterious accident, shortly after he was burgled. Then a young police detective, Tim Fox, is murdered, and Frost wonders if it really is related to the large investigation he was working on to uncover a car theft gang.

The episode was rated 7.51 from 45 votes.

Frost is called upon by Supt Mullett to investigate the theft of his friend's car from their golf club by a confidence trickster, who leaves behind a trail of satisfied golfing widows, unpaid bar bills and stolen cars. It gets complicated when the car is recovered with the body of a local drugs dealer in the boot. What are the connections between the car owner, the con-man and the dead drug dealer?

The episode was rated 7.49 from 47 votes.

Frost investigates a series of break-ins and brutal attacks at the homes of elderly people. He is helped by a female detective, DS Lawson, who also offers him advice on his personal life.

The episode was rated 7.45 from 64 votes.

A body with no identification is found in a local reservoir, and a couple fall victim to a brutal killer in their own home. Frost is assigned a new, female, West Indian detective constable, Ronni Lonnegan, and gets off to a bad start with a few racially-insensitive remarks. He then reluctantly accepts the help of a psychological profiler, psychiatrist Pam Hartley, who he met at a conference. Meanwhile, there is an inspection of Denton Police underway, and Frost's old-fashioned methods are not endearing him to the inspector, so Supt Mullett is forced to give him more support than usual.

The episode was rated 7.42 from 48 votes.

A young woman is found viciously stabbed to death. Frost consults the victim's personal organiser, from which a trail leads him to a religious community.

The episode was rated 7.38 from 39 votes.