Madison Liora (the blonde woman in the towel) only agreed to do her brief nude scene if she got to keep one of the Uncle Sam masks after the film's production was finished.
A lenticular 3-D poster was produced for Uncle Sam. Reportedly, only 10 of the 3-D posters were issued. The images shows four versions of Uncle Sam changing from an old man into a ghoul.
Dedicated to "Lucio" (Fulci, the Italian horror director).
Shortly after the film was released on video in the United States, A-Pix Entertainment wanted to greenlight an Uncle Sam 2, but the plans fell through.
The cast includes two Oscar Nominees: Robert Forster and Isaac Hayes- only Hayes won the award for scoring Shaft decades earlier. And Forster, when appearing in this movie, was not an Oscar-nominated actor yet. In fact, he was almost out of the business until the following years' comeback in Quentin Tarantino's Jackie Brown, where he was nominated for Best Supporting Actor as bail bondsman Max Cherry.