My Own Worst Enemy

This TV season, there is a new show on NBC called My Own Worst Enemy. It has Christian Slater playing the main character and we consider it to be a fairly enjoyable show.

However, the questions raised by the show's premise might be better than the show itself. As background, a man has a chip in his brain which has begun to malfunction. Sometimes, he is a well trained professional killer (aka Edward) and other times he is Mr. Typical Family Man (aka Henry). What is not clear is this: which one is the actual / original pre-chip person? Also, is it okay to have a chip implanted in your brain which affects your personality? The answer seems straight forward to be "No" but if it is okay to have a prosthetic arm why would it not be okay to have a brain chip? If it is okay to have an artificial heart why would it not be okay to have a brain chip?

Interesting questions are raised by this show.