Uncle Jim is an older, friendly man with a grand-fatherly charm who is still useful because of his mechanics skill. He is timid and prefers not to get involved in conflicts. Uncle Jim is one of the traitors, but isn't a bad guy. He is content to remain in Denver, but is torn between loyalty to Porter and the chance of a big steal.
Uncle Jim has not appeared nor is he mentioned in any published game. He was to appear only in Van Buren, the canceled Fallout 3 by Black Isle Studios. It is not certain if he will appear in any future Fallout game.