Ask a Policeman is a 1939 British comedy film directed by Marcel Varnel and starring Will Hay, Moore Marriott and Graham Moffatt.

The letter states that an investigation will shortly take place to see if the police force in Turnbotham Round is necessary at all since no arrests have been made in the ten years that Dudfoot has been a policeman.

However, when the Chief Constable comes round, he fails to be fooled by the 'accident', but the Squire intervenes and claims to have witnessed the accident, which saves Dudfoot, Harbottle and Albert from a lot of trouble.

Dudfoot states that they need to arrest a criminal soon or else their police station will be closed down and Harbottle takes him to the library to look for books on crime.

Back at the police station, the Chief Constable phones them about the smuggling and instructs them to find the navigational light the smugglers are using.

A warning note to keep their noses out of things that are not of their concern is wrapped around a stone thrown in through the police station window.

After a chase on a bike, a lorry and a London bus, the police agents finally capture the smugglers at Brooklands.

Though not a remake, 2007's Hot Fuzz borrowed the plot device of policemen uncovering organised crime in a sleepy area of rural England.

The makers of the Indian film Naalu Policeum Nalla Irundha Oorum (2015) have acknowledged Ask a Policeman as an influence on it.