Murder in the Family/Anne Lockhart/Meet Me in St. Louis Connection
In Murder in the Family, June Lockhart daughter, Anne, played in that episode. At the end of the episode, they all sang Have Yourself a Merry Little Christmas from Meet Me in St. Louis. June Lockhart had a supporting role in that 1944 movie.
Out of all the Christmas and holiday songs to sing I thought it was funny how they chose that song.