As Calder and Tosh close in on the motive for Eadie’s murder, the pool of suspects narrows.

While Calder pressures Louden for help and Tosh investigates Robert Tulloch, Stevie’s battle to keep her sister turns desperate.

In the aftermath of the fire, Tosh and Calder struggle to get answers from an unreliable suspect. A historic grudge from Eadie’s time as a social worker comes to light.

Calder and Tosh travel to the remote village of Lunniswick to investigate the brutal murder of an elderly woman. She has been out in the elements for several days.

Events in Lunniswick turn violent as holidaymakers Chris and Hayley risk it all to clear their debts. A paranoid Stevie wants Amy all to herself.

Tosh finally confronts Billy about his relationship with Robert Tulloch. Fuelled by guilt over Louden, Calder goes after the people responsible.

Elderly Shetlander Mima Wilson is found murdered on the archaeological site in the grounds of her croft. Detective Inspector Jimmy Perez and his team investigate. Can Perez unravel the family feuds and secrets that emerge and restore the security of his beloved Shetland Islands?

The team uncovers the sinister truth behind the facility. But the investigation is diverted when Astrid Jakobson goes missing.

With two murders and no strong leads, can Detective Inspector Perez and his team apprehend the suspect before crowds descend on the Shetland Islands for Up Helly Aa, the biggest fire festival in Europe?

Tosh believes she has the murderer in custody and tasks the team with finding the evidence to charge. Calder suffers in silence with Jean’s revelation.

Calder and Tosh discover the truth behind Rossi’s mission. They must identify Annie’s killer before he can exact his revenge.

When an old acquaintance of Detective Inspector Jimmy Perez dies in a suspicious car accident on the island, he wonders whether his journalist friend had uncovered a story that cost him his life.

After the discovery of an unknown body, the search for Connor grows increasingly desperate. Perez follows Danny on a perilous journey into his murky past.

A Met detective returns to Shetland on the trail of a vulnerable witness. DI Ruth Calder must team up with Tosh to find the girl before it’s too late.

Calder and Tosh must work together to find the armed killers and prevent further disaster. Howell and Nowak take refuge with a local and wait for a means of escape.

Unnerved by her discovery, Calder decides to stay on in Shetland. Tosh welcomes the support, as the revelation of a tattoo sends the case in a sinister new direction.

Calder initially reels from the awful news, but quickly becomes suspicious. Tosh worries Harry and Donnie with her pursuit of a controversial new theory.

The hunt is on for Ian Bett as a picture of Anton Bergen begins to emerge. Are Calder and Tosh dealing with the revenge of a jealous ex-husband?

As Calder and Tosh wrestle with the revelation of Annie’s past, Noah offers a cryptic clue about the night she was killed.

Calder and Tosh turn their focus onto Lisa, until her confession unearths a shocking event and leads the team back to Annie’s inner circle.

After a second body is found brutally murdered on Shetland, Detective Inspector Jimmy Perez wonders if the two killings are connected to corporate greed and corruption on the island or to just one woman - Evie Watt.

Perez returns to his childhood home after the murder of a scientist on the beautiful island of Fair Isle. Tensions run high as a storm on the mainland forces Perez to work in isolation - and compels all of the suspects to remain together under one roof.

Time is running out for Detective Inspector Perez as prime suspect Peter Latimer lies critically ill in hospital. Was the fire a drunken accident, or was Peter Latimer the second victim of a murderer still free on Fair Isle?

A horrifying discovery at the Hayes house changes the course of the investigation. Perez establishes the probable cause for Daniel's murder and his sister Zezi's disappearance.

Sandy feels the heat in the aftermath of Calum’s suicide. Convinced that McGuire is the key to cracking the case, Perez travels to Glasgow in an attempt to track him down.