In my review of 2015’s Doctor Who Christmas special, I speculated that the episode was written in a way to end the story of River Song and that might be a sign that showrunner Steven Moffat is winding down his time at the helm of Doctor Who. One month later, it turns out that I was right.
The BBC has announced that Moffat will be leaving his post as the lead writer and executive producer of Doctor Who at the completion of a twelve episode season in Spring 2017.