A life unraveled emerges in diary entries and interviews in the documentary “God Knows Where I Am” (10 p.m., PBS, TV-PG, check local listings). The film’s title can be stated and interpreted in two very different ways. Put the accent on the second word and it seems an exasperated, even sarcastic, admission of disorientation and loss. Keep the emphasis on the first and it’s a declaration of certainty.
When New Hampshire police discovered a dead body in 2008, they first suspected that their “Jane Doe” committed suicide. But the story that emerges here is a long tale of mental illness, incarceration, isolation and alienation.
