Conversation so far:
what episode is the snowmen in doctor who
The Snowmen is the eighth Doctor Who Christmas special since the show's 2005 revival and the first to be within a series.
when was the doctor who episode, the snowmen, aired
The Snowmen, an episode of the British science fiction television series Doctor Who, was first broadcasted on Christmas Day 2012 on BBC One

Question: who wrote the episode
Self-contained rewrite: who wrote the dr who edisode, the snowmen