PBS | 9:00 pm

Thanks largely to Christopher Nolan’s widely acclaimed 2017 movie, there’s been renewed attention lately to military events at Dunkirk during World War II. The new episode "Great Escape at Dunkirk" takes — expectedly for this series — a scientific approach to the remain of vehicles that were used there, with parts of ships and airplanes newly examined to helped tell parts of the story that still haven’t been revealed yet.