Oh, I agree with that, about the "ultimate hit man" stuff--I think it would have been stupid for Harrow to continue being the Terminator. Once is amazing, do it too much and it becomes stupid. But, it doesn't have to be a choice between tragic and dues ex killing machine. What's wrong with a redemption story? Why not have harrow marry the woman, lay down his gun and literally never appear on the show again. Redemption stories endear characters to people's hearts as much as tragic ones. I love me some Shawshank.
Harrow's Shank Redemption.