google.com, pub-ca-pub-6067120031842370, DIRECT, f08c47fec0942fa0 Past Doctors Speculation began when Peter Capaldi tells the world he is leaving Doctor Who after this year’s Christmas Special. Now even past doctors are getting in on the act. David Tennant and Paul McGann have made their choice for the next Doctor. I realize that twenty or thirty years ago what David Tennant suggest is not a possibility. But in this day I can see it taking place. All we have to do is look…