In the last scene, when they show Richard Parker enter the forest and the screen blacks out, there's a small glowing circle of light, which I assume was meant to be Richard Parker's eye.
Being the optimist that I am, I'm going to believe that Richard Parker did turn back and look at Pi one last time.
What you y'all think?
I think he didn't look back. I think his feelings are a bit...complicated when going back to a place which belongs to him. I think the nature cannot be changed, so does the character of Richard Parker. He is born to be cruel. Anyway, there's of course no definite answer:)