If two people get shot, and nobody is there to watch, did it really happen? Such is the dilemma that confronts fans of the soon to be departed Life on Mars. With an audience dwindling by the week, only the diehards are left – and if they made it to the end of this episode without falling to sleep, they were treated to a pretty shocking ending.While I love this series, the last two episodes have been quite disappointing. Working undercover, Sam works his way into a crime ring, befriending Jimmy McManus. As fate would have it, McManus happens to be the brother of Sam’s former babysitter Colleen, which leads to a reunion with his mother. I’ve not been fond of the episodes focusing on Sam’s mother. Of course this territory needs to be crossed at some point, but the whole dynamic just never seems …