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.