The drama series Luther is back for Season 5 (airing on Sundays on BBC America), with a series of horrific public murders that forces DCI John Luther (Idris Elba) to yet again face the depths of human depravity that exist on the streets of London. As the killings become more bold and risky, Luther and new recruit DS Catherine Halliday (Wunmi Mosaku) try to untangle the leads that seem to keep presenting more questions, and when you throw in an irate gangster (Patrick Malahide) and the always dangerous Alice Morgan (Ruth Wilson), you’ll wonder if anyone will make it …