Pretty silly big-budget movie based on a book by Ira Levin (the guy who wrote "Rosemary's Baby").
A group of frustrated Nazis led by Peck decide the best way to bring back the Third Reich is by cloning their Fuhrer! It's a thinking-man's attempt at making a "They Saved Hitler's Brain" movie that would be totally worthless if it wasn't for the presence of Jeremy Black as a young Hitler. He's awesome as an arrogant brat, treating everyone he meets with contempt and eventually siding with the Jew (Olivier) assigned with stopping the evil cloning project.
Black is the best evil teen to appear in a movie ever. In fact, he even does a better job than Jonathan Scott-Taylor in "Damien: Omen II." In order to guarantee success, the Nazis have made several clones of the evil German leader, placing them in different parts of the world. To ensure maximum evilness in the child, they attempt to recreate the traumas of the original Hitler's childhood for each clone, killing each of the boys' adopted fathers.
Not surprisingly, Peck comes across silly as a Nazi. It's a cheesy movie to say the least, and bombed quite profoundly at the box office.