Members of the local constabulary patrol the town of Ashfordly and the nearby village of Aidensfield in the North Riding of Yorkshire, keeping the peace whilst also dealing with local loveable rogues and their own love lives. The programme is based upon the "Constable" books by Nicholas Rhea.
Nick's pursuit of an escaped prisoner leads him into a more complex case, and Greengrass becomes the school lollipop man, but his new job is soon put in jeopardy.
Nick's job intrudes on his social life when news of an antiques theft interrupts a date. Greengrass's nephew turns up with a business proposition for Claude.
The police are baffled by a campaign of threats against a local shopkeeper. Gina's new boyfriend is hired as pub chef, and Greengrass is alarmed by mysterious events on the moor.
Nick and Jo are worried about a disruptive village schoolboy. Greengrass hatches a plan to 'borrow' Lord Ashfordly's racehorse.
The police investigate a robbery at a wine and spirits warehouse, and Nick discovers the reasons behind Ventress's uncharacteristic behaviour. Greengrass gets a surprise proposition after being cau...
The police investigate a case of hit and run - and Maggie is the chief suspect. Greengrass dabbles in taxidermy, and Jo has a proposal for Nick.
After being sacked, a man goes berserk but Greengrass is on hand with a plan. Aidensfield becomes the location for a fashion photo shoot.
Nick goes undercover to investigate the jukebox business. Ventress goes on a disastrous stag night, and a visit from Inspector Hackett leaves Blaketon worried.
Nick is concerned when a young black Londoner becomes the suspect in a violent robbery, and Greengrass takes bets on a cricket match against Whitby.
Greengrass vies with an old enemy when Aidensfield hosts a quoits match. Nick meets Jo's parents but the evening is interrupted.
Nick investigates a violent incident on the golf course while Blaketon faces a crucial dilemma, and Greengrass gets involved in a greyhound-betting scam.
When a routine domestic disturbance takes a sinister turn, the CID are summoned. A wrestling show visits Aidensfield and Greengrass plays host to the Masked Marvel.
A woman seeks Nick's help after he rescues her from a house fire. Greengrass decides to enter the tourist trade by offering bed-and-breakfast.
A notorious post office robber pays a visit to the area, and a well-to-do woman begins to be haunted by her past. Meanwhile, Greengrass is on a quest for a Victoria Cross.
Nick is suspicious when a financial salesman calls at Jo's cottage. Maggie urges the police to investigate when a rash of poison-pen letters causes concern in the village.
Nick goes undercover in Whitby in pursuit of an escaped prisoner, while an unexpected visitor leaves Eileen facing a dilemma.
Heavy snow threatens Ventress's debut as Father Christmas and leaves Nick and Jo coping with a moorland crisis on their own.