A bushcraft expert is reported missing in remote Sutherland. The officers battle to uncover which route he took before a blizzard sets in.

The hunt for a missing person takes a turn as police find out he is wanted by another force. Meanwhile, Inverness CID raid two properties suspected of connections to county lines drugs gangs.

An experienced hiker has not returned from the top of a mountain on Skye, and a concealed attic in Dingwall reveals evidence of a cannabis-growing operation.

Officers on Skye struggle to keep a royal visit from the future king under wraps.

Officers on Skye are tipped off about a resident suspected of possessing an illegal weapon, and dangerous winds in Harris cause a road traffic incident.

On the Isle of Skye, experienced climber Frank has gone missing in the mountains. As the weather closes in, police desperately search for clues to discover his exact route.

The county lines drug epidemic has taken further hold in Inverness, bringing increased violence and drugs deaths. Specialist CID officers bust down doors in search of the gangs.

Detectives race to the scene of a violent attack on an island in the Hebrides, cops settle a dispute between two crofters, and an arrest is made in Shetland for a hate crime.

Officers in Kyle of Lochalsh conduct a search warrant on a flat of an elderly neighbour who they suspect is dealing Class A drugs.

Cops search for a young man lost in the foothills of the Cairngorms. In Inverness, a shocking hit-and-run sparks a hunt for a man and woman on a violent crime spree.

Torrential rain hits the Highlands, flooding roads and fields. As conditions worsen, a missing person search becomes a desperate manhunt.

On the Isle of Lewis, police hunt for suspected salmon poachers. In Glencoe, PC Stephen Cooper pursues a missing person case, and in Inverness, cops conduct drug raids in the city.

Bomb disposal are called in when a chemical lab is found in a flat. police search for missing walkers in Glencoe, and wildlife cops investigate an attack on a bird of prey.

A team of police travel to the Outer Hebrides to search through the snow for a missing 16-year-old. In Shetland, the cops have to deal with Viking revellers and a drunk driver.

Police investigating the disappearance of a popular barman find human remains near Aviemore. In Caithness, cops are shocked to discover tropical animals in a derelict house.

Police deal with a tragic accident on the A9, one of the Highlands’ busiest and most dangerous roads. Meanwhile, officers hunt for a wanted man in the dark forests near Fort William.

Police on Skye raid an abandoned house they suspect is being used to grow cannabis and deal with a three-car accident that has caused chaos on the island’s main road.

Police on the Isle of Lewis raid the home of a suspected drug dealer. In Inverness, a man with a knife is causing chaos.