Edward Norton has produced some first class performances, starting with his debut alongside Richard Gere in the 1990's, but, for me, this is the finest to date from this under-acclaimed actor. Here, he plays both of two idential twins who could hardly be more different in character: one, a narcotic lab-running country lad from rural Oklahoma, the other a philosophy professor at Harvard. If the portrayal of both is just a tiny bit cliched, it's as near as dammit that you're going to get in 1.5 hours on the big screen, and what really matters to me is that he plays both roles equally perfectly (his portrayal of the country boy is often brilliantly hilarious). Often the two are together facing each other and arguing and fighting, so it's obviously shot seperately, but excellent direction/production makes it work just right. It must be very hard to do well, dialoguing with someone who isn't there, but Norton does it brilliantly and in my world, this achievement alone would get him the oscar (but...won't happen). The story is well told as well: no need for me to ruin it for you, but Norton's accomplishment is, to my taste, a career-best thus far.