Originally Posted by xSamhainx 
The final showdown between Humbert and Quilty is nothing in the original, a terrible disappointment, it's literally some text that flashes onscreen explaning that Humbert kills Quilty and dies in prison. In that respect also, the remake handles this better, there's a great scene that actually portrays the murder of Quilty by the vengeful Humbert.
I'll admit it's been years since I saw it, but I'm
positive I can recall Quilty's death scene — it was absolutely hilarious, with Peter Sellers alternately reeling from the bullets, pontificating, and swigging a last mouthful of booze, before finally expiring. Didn't the film start with that? (I never saw the Jeremy Irons remake, so it can't be that.)