The Forbidden Territory
Alma Reville (screenplay), Dorothy Farnum (adaptation)
Ronald Squire as Sir Charles Farringdon, Binnie Barnes as Valerie Petrovna, Barry MacKay as Michael Farringdon, Anthony Bushnell as Rex Farringdon
Major rewrite to the book. This movie has a British Sir Farrington traveling to the Soviet Union with his son in search for another son being held in prison. They plan to get him out with the help of the prisoner's love, Valarie.