Jan Karski (24 April 1914 – 13 July 2000) was a Polish World War II resistance movement fighter and later professor at Georgetown University. In 1942 and 1943 Karski reported to the Polish government in exile and the Western Allies on the situation in German-occupied Poland, especially the destruction of the Warsaw Ghetto, and the secretive German-Nazi extermination camps.

Jan Karski was born as Jan Kozielewski on 24 April 1914 in Łódź. He was raised a Catholic and remained one throughout his life. He grew up in a multi-cultural neighbourhood where the majority of the population was then Jewish.

After graduating from a local school Kozielewski joined the Jan Kazimierz University of Lwów (now Lviv, Ukraine) and graduated from the Legal and Diplomatic departments in 1935. During his compulsory military training he served in the NCO school for mounted artillery officers in Włodzimierz Wołyński. He completed his education between 1936 and 1938 in different diplomatic posts in Germany, Switzerland and the United Kingdom, and went on to join the Diplomatic Service. After a short period of resident scholarship, in January 1939 he started work in the Polish Ministry of Foreign Affairs. With the outbreak of World War II Kozielewski was mobilized and served in a small artillery detachment in eastern Poland. Taken prisoner by the Red Army, he successfully concealed his true rank by pretending to be an ordinary soldier and was handed over to the Germans during an exchange of Polish prisoners of war, in effect escaping the Katyn massacre.

Felix Frankfurter (November 15, 1882 – February 22, 1965) was an Associate Justice of the United States Supreme Court. Frankfurter was born in Vienna and immigrated to New York at the age of 12. He graduated from Harvard Law School and was active politically, helping to found the American Civil Liberties Union. He was a friend and adviser of President Franklin Roosevelt, who appointed him to the Supreme Court in 1939. Frankfurter served on the Supreme Court for 23 years, and was a noted advocate of judicial restraint in the judgments of the Court.

Frankfurter was born into a Jewish family on November 15, 1882, in Vienna, Austria, then part of the Austro-Hungarian Empire. He was the third of six children of Leopold and Emma (Winter) Frankfurter. His forebears had been rabbis for generations. In 1894, when he was twelve, his family immigrated to New York City's Lower East Side. Frankfurter attended P.S. 25, where he excelled at his studies and enjoyed chess and crap shooting on the street. He spent many hours reading at The Cooper Union and attending political lectures, usually on subjects such as trade unionism, socialism and communism.

Christian Brückner (born 27 October 1943) is one of the most prolific and well-known German voice actors today, as well as a frequent actor.

Christian Brückner provides the German voice-dubbing for such actors as Gary Oldman, Robert De Niro, Robert Redford, Martin Sheen, Harvey Keitel, Burt Reynolds, Dennis Hopper, Gérard Depardieu, Donald Sutherland and Jon Voight.

He has also collaborated with the German trance/techno-band E Nomine on a number of their albums.