Clearly it is "My Son John" seminal anti-communist McCarthy era film that was coincidentally Robert Walker's last film.
Helen Hayes plays the cloying mother to a nice young man who just might be a Soviet Spy!!!
For some reason "My Son John" has never been released on VHR or DVD nor does it circulate on the bootleg circuit making it an authentic rarity from the 1950's.
"My Son John" screens at 9pm tonight at the Harvard Film Archive 24 Quincy Street in the teeming heart of Harvard Square Cambridge.