With so much death during the episode, fans were rightly left feeling shocked by events, expressing as much on Twitter.
The series climaxed with the psychopathic murderer Alice Morgan (Ruth Wilson) falling from a lethal height to her death and John Luther (Idris Elba) being arrested.
While fans thought Benny (Michael Smiley) being killed by a mobster during the penultimate episode was bad enough, the finale has a lot worse in store.
The fifth series of Luther has come to an end, but not without a few casualties.