Jon Ronson and Errol Morris in conversation. The MK Ultra project is a foundation to "Wormwood," and it’s also explored in Ronson’s book, "The Men Who Stare at Goats." They discuss why this case is a favorite among conspiracy theorists, and the challenges of digging for the truth.

Errol Morris interviews actor Peter Sarsgaard. He plays CIA scientist Frank Olson in scripted segments, imagining what could have happened in Olson’s last days. They discuss the challenge of playing a real person and Sarsgaard’s relationship to the story.

Errol Morris interviews the protagonist of "Wormwood," Eric Olson. They discuss Eric’s fifty year investigation into his father’s death, and the experience of having his story adapted for the screen.