This was one of the last movies released in Universal's "Inner Sanctum" series, and it's a doozy. It's a phenomenal piece of pulp drama/horror with some truly shocking moments and a great cast. I salute writer M. Coates Webster for daring to build such a slow-burning script, which really doesn't begin to build horrific tension until about forty minutes in (and the movie's only an hour, in keeping with the serial requirements of the franchise). Director John Hoffman follows suit, lingering on great moments of human drama. He and the actors to a lot with a little, proving that the right story and the right group of thespians can turn even a B-movie like this into something compelling, and by the time the disturbing events come in the final act, we are deeply invested in the Carter family and their well-being- which is unfortunate, considering the things that happen to them. Lon Chaney Jr. plays head of the family and genius chemist Jeff Carter, who is on the brink of a cure to influenza in the form of a miracle drug, but his boss, greedy corporate head Roger Graham (J. Carrol Naish), wants to put the drug on the market before Carter has proved its perfect efficiency. Carter puts his wife and son on the line and goes to South America to experiment with a mold found only there with his assistant Dave, played wonderfully by Lloyd Bridges, all on Graham's dollar; but as Carter exits the country, Graham pounces on both the opportunity to release the imperfect flu drug and punce on Carter's wife. What follows is a tragic and strange final act that left me with my jaw dropped.