NEW YORK, Nov. 7 (UPI) -- Boardwalk Empire and Nine Perfect Strangers actor Michael Shannon says working on his new fact-based drama, Nuremberg, was a history lesson for him.

"It was James Vanderbilt's -- our writer-director -- it was his crusade. He been trying to get this movie done for 13 years. So, I just felt honored that he asked me to be a part of it," Shannong told UPI in a recent Zoom interview.

"When I read the script, I was a bit embarrassed to realize how little I knew about this story and I'm just so grateful that I got to discover who Robert Jackson was and what he was responsible for in our history because I didn't know anything about him," he said.

"Robert Jackson had an inherent desire to search for justice and truth, like most people that get into the law. Hopefully most people," he added. "He was highly intelligent, but not arrogant, not an aristocrat. He worked hard to get where he got and he was a very thoughtful and compassionate person who just wanted to bring justice to light."

In theaters Friday, Vanderbilt's adaptation of Jack El-Hai's book, The Nazi and the Psychiatrist, follows Jackson, the chief U.S. prosecutor charged with trying the surviving members of the Nazi regime after World War II.