 In Grey Night, Harling (played by Adrian Pasdar (qv)) is a morphine addict  and shoots up a few times.  These scenes are shortened, but not absent in The  Killing Box.  If you see him sitting alone by a tree, hes just used the  needle. Many scenes and shots are shortened in The Killing Box including  reaction shots and anything that makes the members of the ghost brigade  appear sympathetic. The ending of Grey Night is much longer and shows the  death of Billy Bob Thornton (qv)s character.