Unlike most silent films (even the recent revival "The Artist", this silent film has no dialogue boxes! How can a film run for well over an hour without any spoken dialogue or dialogue boxes? It would seem like an impossible task, but Russell Rouse accomplished it, as well as the courageous Ray Milland, who deserves kudos for taking this challenging role. I first saw this film as a child, and I thought it was a bit boring because I did not understand things like spies, science and a guilty conscience. We already know the film code will make Milland pay for his actions, but we do not know exactly how this will be accomplished; and that is the fun of this film. Don't miss it.