"A sin to err" is seen in two different places in the film - on a poster in the cryptanalysts' room and circled letters in the end titles. ASINTOER are the eight most used letters in the English language. This is used in frequency analysis to help break enciphered messages.
Agnes Driscoll, played by Meg Brogan, is a fictionalization of an actual historical person. The real Agnes Driscoll, who is sometimes described as "the first lady of naval cryptology," was one of the U.S. Navy's leading cryptanalysts during the twentieth century. She died in 1971 and is buried in Arlington National Cemetery.
Eight actors from The Red Machine (2009) appeared in the short film Gandhi at the Bat (2006), which was also directed by Stephanie Argy and Alec Boehm: Lee Perkins, Donal Thoms-Cappello, David Ross Paterson, Nicholas Tucci, Stephen Kirkpatrick, John Gordon, Doug Swim and Ryan Pamiez.