I always call this the "alien POV." When we're looking over Detective Gerard's shoulder, we don't "become" the genius, maverick hunter of men. We see him through the perspective of Dr. Kimble: he is hunting us, and that genius nature gets us ever closer to capture. When Gerard exhibits change at the end of the movie, we the viewers don't feel changed; we feel as though we've held out, and our better nature has softened him up. To put it another way, we see the IC's story through a keyhole, but we never enter his room.
As another example, take "Silence of the Lambs." In the book (and to a similar extent, the movie), there are several chapters which don't follow Clarice Starling's POV. Just in the book, there's one or two in Hannibal's (the IC), one in Jame Gumb's (the Antagonist), one in Jack Crawford's (the Mentor, kinda), one I believe in the senator's daughter's (the... MacGuffin? I don't recall offhand what her Archetype is), and even one in Dr. Chilton's (the Contagonist, kinda). So we're freely allowed to jump from mind to mind, just so long as the audience remembers who we came to the dance with.