Kevin Costner almost turned down his role in "Hidden Figures." Based on the remarkable true story of African-American women mathematicians at NASA in the 1960's, it is an inspiring, uplifting story of the triumph of intelligence, hard work, dedication, and integrity, despite the powerful obstacles they faced as women of color. But the supervisor character played by Costner was the weakest part of the original script. "My character was one they didn’t have the rights to. So he really was an...