Watch Unknown Distance (2018) : Full Movie Online Free After five tours and serving ten years as a Marine Sniper, Sgt. Douglas Brown, takes us on an emotional eight month journey across America, engaging with fellow servicemen who were once a part of a highly trained military team with a specific skill set now rendered useless. The story unfolds when Douglas and an Afghan Interpreter, who served with him in Afghanistan, reveal the story that bonded them for life. Recalling those horrific memories trigger Doug's existing PTSD (Post Traumatic Stress Disorder) that continues to corrode his personal relationships, and has led to his erratic, inappropriate and self damaging behavior.