Jacknife is a 1989 American film directed by David Jones and starring Robert De Niro and Ed Harris. The film focuses on a small, serious story, with emphasis on characterization and the complex tension between people in a close relationship.PlotThe film follows Joseph Megessey (known to most everyone as Meg), a Vietnam war veteran suffering post-Vietnam stress syndrome, who is having trouble fitting in with society. He takes on the responsibility of drawing Dave (Ed Harris), a drunken t