Karski & the Lords of Humanity
The film tells the story of Jan Karski, the Polish underground courier who traveled across occupied Europe to inform the Allied powers of Nazi crimes against the Jews of Europe in an effort to prevent the Holocaust.
Starring Jan Karski
Watch "Karski & the Lords of Humanity" from streaming services Amazon, Plex Free released in 2015. It's a documentary and drama movie, and has a rating of 7.5 out of 10 from Imdb which is usually fine for this kind of movie.