8PM, ABC This four-part drama, starring HappyValley’s BAFTA-winning Sarah Lancashire (above), goes dark – especially in this second episode. But such are the compelling performances, it’s difficult to turn away. Tonight, as we find out the fate of young Kiri, fingers point towards her estranged, drug-addicted father. Meanwhile, the general public is rounding on Kiri’s social worker, Miriam (Lancashire). Hard to watch, but unmissable.