Did Cole Know (Spoiler)?
Almost everybody familiar with this movie is familiar with the twist at the end, which is a pretty big twist. I remember 15-years ago watching this with a friend who didn't get the ending, but it all made sense to him when he found out Malcolm was dead as there are subtle hints in the movie that he isn't alive.
But, the question for the movie is does Cole know? Cole seemed to be talking to him just like anybody else. I think Cole did, and in the last scene he and Malcolm are in, Cole tells Malcolm to talk to his wife when she's asleep for her to listen. That indicates that Cole knew. Though Malcolm seemed different from all the other dead people in the movie.