Off topic a little, but this story reminds me of a Baron that got "stuck" this side of the Tasman a few years ago after making a "freight run" from Oz.
Not sure what ever happened to it in the end, I don't think the owner even knew it was on an international flight till very very late in the piece, though to be fair I don't think it officially left Oz. Some young gun had hired it for a weekend trip away.