Just finished a marathon watching of all five seasons of The Wire...great show. Idris Elba (Stringer Bell in the Wire) is also the title character in the excellent BBC series Luther.+1 season 2 is slow but 3,4,5 (the finale) are great!
It's the story of the war on drugs in Baltimore told from the perspective of the cops, the mayor, the journalists, the dealers (high and low level), the kids, the school teachers, the junkies.
tons of story lines very engaging.
Also highly recommend Kenneth Branagh as the moody Swedish detective Wallander (BBC, PBS) and the new BBC/Cinemax series Hunted.