Marshland, 2.15am, Ch4

SPANISH thriller — a critical hit in its homeland — following two Madrid detectives to a backwater Andalucian town. In 1980, political unrest is rife, and mismatched cops Pedro and Juan are on the trail of a serial killer who is raping and murdering teenage girls. Nerea Barros, pictured, plays a mother whose daughters are among the killer’s victims.