Luther (2010)

S5E3 Episode 3

As Luther grapples with the threat to his friend's life and a young woman taken hostage by a merciless serial killer, he faces a daunting challenge: can he safeguard the innocent while also stopping Cornelius from succumbing to his vengeful instincts? With tough choices ahead, Luther must decide who he is ready to fight for and who he cannot afford to lose.