(1) Prime Suspect: Complete Collection
High production values, Helen Mirren in the lead as hard-as-nails DCI Jane Tennison and stories by Linda La Plante. It's little wonder that the seven series won a host of Emmy, Bafta and Golden Globe Awards.
(2) Spiral: The Complete Series
France's answer to the The Wire with extra Gallic grit. The two-series boxset is full of bloody murder, Parisian banlieues and a plot with more twists than a Cotswold country lane.
(3) Sherlock Holmes: The Complete Collection
Jeremy Brett steals the show as Conan Doyle's urbane and rather flouncy detective in the classic ITV series. Light on gore but long on gripping storylines.
(4) Cracker: Complete Collection
Dr Eddie "Fitz" Fitzgerald (Robbie Coltrane) may be a hard-drinking poor excuse for a husband and father ? but he is also an outstanding criminal psychologist.
(5) The Killing
Detective Sarah Lund's 20-hour, 20-episode investigations into the death of a missing girl exposes a Copenhagen wrought with corruption, vice and deadly struggles for power.
(6) Agatha Christie's Poirot: Complete Collection
The meticulously moustachioed detective, played here by David Suchet, and sidekick Captain Hastings put their "little grey cells" to work solving murders and cracking conspiracies.
(7) The Wire: The complete series
The ultimate cop show. The multi-award-winning series follows Baltimore's finest as they battle crime and their own self-destructive tendencies over 50 perfectly poised episodes.
(8) Wallander Collection
The original Swedish version of Henning Mankell's books, in which intellectually brilliant but socially clumsy detective Kurt Wallander solves crimes against the backdrop of eerie Scandinavian towns.
(9) Cagney and Lacey Collection
A cop show classic which was a feminist boundary-pusher when it first hit screens in the US in 1982, and with its heady mix of action, humour and pathos continues to entertain today.
(10) Luther Series 1 & 2
Idris Elba (formerly of The Wire) stars as a philosophical policeman locked in a moral crusade against all that is dark and scary on London's streets.