Almost 60,000 Americans died in the Vietnam War, including John Hartley Robertson, apparently felled while participating in an attempted helicopter rescue in Laos in 1968. That at least was the official story – and in 1982, Robertson's name was duly etched among the dead at the Vietnam Veterans Memorial. However, in 2008, another Vietnam vet, and born-again Christian missionary, Tom Faunce, heard reports that Robertson was still alive and in Vietnam. Unclaimed is the record of Faunce's efforts to find Robertson, prove his identity (in the face of resistance from both the U.S. military and some of his immediate family) and, if proved, return him to the United States to meet his sole surviving sibling. Part mystery, part forensic investigation, part journey to troubled pasts, part redemption song, Unclaimed is all heart. Don't forget the Kleenex.
April 30, 9 p.m., Lightbox; May 2, 3:30 p.m., ROM; May 4, 1 p.m., ROM.