Did Jesus Christ ever have an erection? John Marks poses that question to his Christian friend Craig Detweiler in the film Purple State of Mind, which is showing in limited release and available on DVD (see www.purplestateofmind.com). As the title suggests, the film is about what happens when red-state and blue-state types mix it up. Marks and Detweiler were college roommates in 1982, the year Detweiler converted to Christianity and Marks, a cradle Presbyterian, turned into a religious skeptic. Both have since launched media careers—Detweiler as a filmmaker and theologian at Fuller Seminary, Marks as a writer and producer for 60 Minutes, now working independently. As one might expect, the film is snappily produced. It also has spectacular music and crisp editing that captures the friends’ vulnerability and humor.