In The Boys From Brazil, Gregory Peck gives a truly mesmerizing performance as the infamous Nazi scientist Josef Mengele. He is wicked and cruel and yet sympathetic and charismatic. I sometimes use the scene select option on the DVD just to rewatch some of his scenes. While Olivier is a great actor I just think he is totally overshadowed by Peck in this role. Olivier's character is allegedly based on the ruthless Nazi hunter Simon Wisenthal. But the way Olivier was asked to portray Lieberman, it makes him look bumbling and weak. Maybe the filmmakers are just sticking to the source material, Ira Levin's book, which I admittedly haven't read. Mention should also be made of James Mason who plays the Nazi colonel who at first supports Mengele but then abandons him after Neo-Nazi command pulls the plug on the good doctor's project. In summary, this film is a pure treat for Gregory Peck fans, 8/10.