The film was inspired by a radio interview with Bishop Carlton Pearson on an episode of NPR's "This American Life." The show's host, Ira Glass, was a producer on the film.
Although the film received mixed reviews, star Chiwetel Ejiofor (12 Years a Slave) received rave reviews for his performance as Bishop Carlton Pearson.
The episode of NPR's "This American Life" with Bishop Carlton Pearson was entitled "Heretics." "Heretic" was the original name of "Come Sunday."
Based on actual event of Carlton Pearson.
The role of the assistant pastor, Henry (Jason Segal) is a composite character of several of the white assistant pastors at Higher Dimensions who left after Carlton's Pearson's theological shift.