In essence, Underground is merely another violent attack on the barbarism of Nazism, with elements of the chase, minor romance and a gleam of hope at the finale. It has the urgency of an overpowering subject, with the usual Warner punch. It’s a potent picture.
Yarn deals with the underground anti-Nazi movement in the Reich, specifically, with the outlaw shortwave radio stations that help to spread the voice of truth and freedom and thus keep Nazi officialdom in a state of frenzy. It’s a story of brother-against-brother, of a forbidden love between a young, idealistic Nazi zealot and a girl member of the underground movement, and of a tragic death of several leaders of the group serving to open the eyes of the hero to the real evil of Nazism.
From a scripting, production, direction and acting standpoint, Underground is a sincere effort. It has the integrity that indicates its makers believed in what they were doing. Jeffrey Lynn, Philip Dorn and Kaaren Verne are undeniably persuasive as the young leads.