Sam Egan, the writer of this episode, based the story of the episode on his father's experience in Auschwitz during World War II where his first wife and their young daughter were murdered by the Nazis.
Alex Diakun later reprised his role as Nicholas Prentice in Gettysburg (2000) and Time to Time (2001). He is the only actor to play the same character in three episodes of The Outer Limits (1995).
Saul Rubinek plays Aaron Zgierski, the son of the Polish Holocaust survivor Leon Zgierski. In reality, Rubinek's parents Israel and Frania were Polish Jews who were hidden by a Catholic woman named Zofia Banya, over the objections of her abusive, anti-Semitic husband Ludwig, on her farm outside Pinczow, Poland from 1943 to 1945.
Miriam Zgierski was murdered by SS-Obersturmführer Karl Rademacher in Auschwitz on March 3, 1944.
The first three words seen in wrought iron are ARBEIT MACHT FREI. This is a German phrase meaning "Work sets you free" which appeared at the entrances to Nazi concentration camps.