Errol Morris on 'Wormwood,' a new kind of drama-documentary hybrid

For his new series Wormwood, documentarian Errol Morris used interviews and archival footage to tell the story of Frank Olson, an Army scientist who died a mysterious death in 1953. But he also cast Peter Sarsgaard to play Olson in scripted sequences. Netflix footed the bill, though no one quite knew what they were getting themselves into when they first took on the project.