This movie covers a significant amount of history in just under 2 hours of run time. The movie begins perhaps in early 1938, as both the establishment of the Protectorate of Bohemia and Moravia and the invasion of Poland happen later on in the movie. After these events, the movie moves quickly, giving the audience the impression that certain events in the movie all happened in a short amount of time. The Nazis transported the first Polish Jews to Auschwitz on June 14, 1940, Poland was invaded on September 1, 1939. More specifically, however, the Auschwitz Orchestra wasn't established until December 1940, but the Women's Orchestra wasn't established until 1943. Which means the Ruben family was hiding in the school for upwards of four years. The Women's Orchestra was moved on November 1, 1944, to Bergen-Belsen Concentration Camp. Bergen-Belsen was liberated on April 15, 1945, by the British. As for the conspiracy to kill Hitler, the evidence in the movie suggests it was the Operation Valkyrie plot put together by the German army and put into action on July 20, 1944. As for the end of the movie, that is a bit harder to pinpoint. The US began transporting refugee holocaust survivors as early as 1946 and as late as 1953.
The role of Robert Pulaski in I'll Find You was Leo Suter's Leo Suter first main part in a feature film. He also played the main part in the TV series Valhalla and both - I'll Find You and Valhalla Vikings: Valhalla (2022) had their premiers on February 25th 2022.
Stellan Skarsgård (Benno Moser) & Connie Nielsen (Lena) also worked together on Nymphomaniac: Volume 1 (2013) as Seligman & Joe's mother respectively.