Board Thread:Character Discussion/@comment-11058666-20150826195114/@comment-26116863-20150830233143

I think they reached a point in his character development that they just didn't know where to go from, so they decided to just "reboot" him and start all over. He was working out most of his problems, and had started to fade into the background as just another upstanding citizen doing his duty. And of course, they couldn't have that :D. Boring.... Every show needs a permenant recurring villian, Be it Mortiarty, The Master, or Callisto.....

I guess they thought that by the time they had made him work out all his problems, the show would be over. This is what happens when you stretch a good show too far beyond it's original premise.