This episode has an alternate interpretation.  He didn't necessarily kill his wife by "laissez faire."  He had been waking up every two hours for a long time to give his wife a pill.  It's very possible that one night he was so tired that he didn't wake up.  The fact that he heard the alarm in his sleep and was aware on some level of what was going on does not prove that he was awake and killed his wife via conscious action.  This kind of arrangement for medication is a recipe for failure anyway.  Anyway, the voices he heard could have been a manifestation of his guilt and not an actual superhuman ability.  I couldn't hate the guy.  Morality play; superhuman abilities.