Adapted for the screen by Edward Anhalt from the play by John Osborne, Luther stars Stacy Keach as religious leader and heretic Martin Luther. In minimalist fashion, the film traces Luthers disillusionment with the Catholic Church, and his eventual spearheading of the Reformation movement. Then in his early thirties, Keach convincingly ages from an ingenuous seminarian to a disgrunted, middle-aged firebrand. Director Guy Green does little to cinematize the material, which is a detriment visually but an advantage in terms of allowing the rich dialogue to be fully appreciated. Luther was a production of the American Film Theatre. ~ Hal Erickson, All Movie Guide