In 1941 Werner Heisenberg traveled from Germany to Nazi-occupied Denmark to see his old friend and mentor, Neils Bohr, the godfather of quantum physics. Werner's motives for the visit are still the object of much speculation, hence this televised drama based on the stage play.

His former protege's efforts to develop a nuclear bomb for Nazi Germany angered Bohr, but even he noted the irony that Werner's efforts hadn't harmed anyone, while Bohr himself assisted the production at Los Alamos for two years.

You'd think a meeting between two physicists discussing nuclear physics would inadvertently discover a cure for insomnia,  but it's surprisingly good and accessible, and poses more questions than it answers.