Peter Mortimer & Nick Rosen - The Dark Wizard

Climbing documentarians Peter Mortimer and Nick Rosen are known for films such as "The Alpinist" and "Valley Uprising." Now the directors are out with a four-part documentary series "The Dark Wizard," which premieres on HBO Max on April 14. The documentary traces the life of Dean Potter, who was well known in the world of climbing for his bold free soloing, BASE jumping, and highlining. But the…