I guess I don't have a great explanation, but this looks like a fold. I don't think any hands really make sense with the line he took, even if the river is a bluff(if hes bluffing a missed draw, he shouldn't have been drawing to begin with, except maybe Td8d). From what it seems to me, and other people are saying, this villian looks fairly bad and you will end up with his money anyway. No need to pay off a terrible play on his part.