Jessica James succeeds Cassie Stuart as DCI, after two interim leaders. The detectives are on a mission to uncover the mystery behind an unsolved murder that occurred 39 years ago. Beneath the ground of a demolished house, the bones of the victim are found. With this evidence, the modern police team open a case to unearth the history that has remained buried for decades. Four main suspects emerge, and as their dark past is unraveled, the truth behind the events of the crime are finally revealed.

Season 4 Episode 2 - Episode 2

Cassie and Sunny identify four potential suspects who trained as police probationers together, and two of them are still serving officers. They have no luck finding the rest of the body and decide to go public about the discovery of Walsh's remains. Air Date : 1st-Mar-2021

Season 4 Episode 1 - Episode 1

A dismembered body is found in a scrapyard and the team believes the remains had been stored in a domestic freezer for 30 years. Meanwhile, after making the decision to retire from the police force, Cassie faces a dilemma when she learns she isn't entitled to her full pension payment unless she completes her 30 years of service. Air Date : 22nd-Feb-2021  Read More

Season 4 Episode 2 - Episode 2

Cassie and Sunny identify four potential suspects who trained as police probationers together, and two of them are still serving officers. They have no luck finding the rest of the body and decide to go public about the discovery of Walsh's remains. Air Date : 1st-Mar-2021  Read More

Season 4 Episode 3 - Episode 3

Cassie and Sunny interview each of the four suspects, who all deny knowing the victim. Bouting discovers Walsh was cautioned three weeks before his death. Air Date : 9th-Mar-2021  Read More

Season 4 Episode 4 - Episode 4

Cassie and Sunny discover Walsh was chased by all four suspects on the night in question. Willets realizes Fiona's blood sample may have been deliberately lost by Liz. Air Date : 15th-Mar-2021  Read More

Season 4 Episode 5 - Episode 5

Cassie and Sunny interview two of the suspects again and get closer to the truth of what happened to Walsh. Balcombe believes she may have found the cause of death. Air Date : 22nd-Mar-2021  Read More

Season 4 Episode 6 - Episode 6

Despite a tragic turn of events, Sunny and the team narrow down the suspects. Air Date : 29th-Mar-2021  Read More