Sheridan Smith presents a countdown of the top 25 TV detectives of all time, as voted for by the British viewing public. From Marple to Magnum PI, Luther to Line of Duty and Cracker to Columbo, Sheridan takes viewers on a whistle-stop trip through 70 years of the most famous sleuths on television. From the spires of Oxford with Morse to the skyscrapers of New York with Cagney & Lacey, and from the quintessentially British Midsomer Murders to the brooding Scandi Noir of The Bridge, the programme flips through the crime files of the greatest detectives that have ever graced TV screens.