On Tuesday, Sept. 12, at 8 p.m. EDT, PBS gives the Reformation television exposure when it airs “Martin Luther: The Idea that Changed the World.” This one-time, nationwide showing is a great reason for congregations and communities to gather together and explore Luther’s lasting impact on Christianity. The film is also available for private showings for those unable to watch that evening. Check your local PBS listings for specific air times. Learn more about the film at NewLutherMovie.com/ELCA.