Junk is a gritty personal project about a junkie's life, with Tom Jane.
Tom Jane was only allowed to make the movie in return for starring in a rigidly formulaic popcorn movie, Homeless Dad. It was directed by Francois and Gerard Sauterne, who also directed Les Cousins Dangereux. He was researching the life of homeless people when Lindsay thought he was a handsome movie star. When she found out he was homeless, she was disgusted. ("The One Where They Build a House")
- In "Spring Breakout" and "Mr. F", posters for Junk can be seen at Maeby's movie studio.
- Sauterne is a name for generic low-quality white wine.
- The tagline on the movie, "They Shoot Heroin, Don't They?", is a reference to a Sydney Pollack movie, They Shoot Horses, Don't They?