The PBS version, provided by Independent Lens, is a slightly shortened version, evidently designed to fit within
an hour an hour and a half (actually 84.5 min); we posted excerpts of reviews of the full version here on PT. I have seen the complete film and highly recommend it. Besides the promotional material for the film at the PBS link above, you may also see an interview with the directors “about the, pardon the expression, evolution for this film, how they tried to tell the story in a balanced way, and what it was like to climb a fossil-infused cliff for one key scene” with Dan Phelps.
In an article 2 days ago, the Louisville (Ky.) Courier-Journal asks, “What happens when religious ideology clashes with mainstream science in America?” The film goes part of the way toward answering the question.