WARNING: SPOILERS/NSFW'Arrow' 4x05 - 'Haunted'Review Laurel, as usual, is an idiot, and pretty much no matter how you look at it, this is the worst she's been in a while.  She's just terrible.  But everyone should relax! John Constantine is finally here!  Here Constantine is in both flashback and present day form defeating evil with ancient incantations and his quick british wit!  We've missed the bloke for sure!  Meanwhile, Quentin Lance finds an unlikely ally in Diggle, and the two embark on a journey to erase a number of names on a list of some sort and find out why Andy Diggle (John's brother) had to die!