Umm... what the hell was that? Luther has had short bursts of ridiculous behavior--wacky for a while, but never in the long, sustained manner like "Episode Five," the episode which goes completely overboard with everything unrealistic. I didn't even know how to react. Watch uncomfortably? Laugh?
Ian is a character who lurks in the background and, along with the other characters sans Luther, Zoe, and Alice, isn't developed whatsoever, though there is a distinction between him and a boyscout like Schenk. But somehow, he's turned into this wackjob in "Episode Five" who finds himself involved in a robbery and then starts killing people. Why and how does this happen? For the sake of crazy shit happening, of course. Obviously there's no logic behind this.
Looking ahead to the season finale, all the insanity will carry over as Zoe is now dead, Ian is out there, and Luther will probably be the prime suspect in his wife's murder.
Score: 7.0/10