Well, of course, Simone Simon “made” the movie. But Conway made a great villain. He’s never really gotten much credit and pretty much stayed in the shadow of his far more famous brother, George Sanders. He was a great villain in Tarzan’s Secret Treasure, as well- again, debonair, but sleazy.
Yes he did, like the rest of that movie his role was unpredictable, fresh, and unique, it is a great movie that I watched again just last week, it holds up extremely well in my mind and for some reason I found the Serbian angle very exotic and exciting.