If you can get over Welles' really "Gilligan's Island"-Irish accent, you get to see Rita Hayworth deshabille and the always brilliant Everett Sloane (Bernstein from "Kane.") You'll also see one of the great movie climaxes of all time, the famous mirror scene.
As a parallel to agency life however, I give you the above. Even out of context it's great. In context, it's even more.