Two intervening minisodes were released. One,
Doctor Who: The Great Detective (2012), was created for the Children in Need special. The second is
Doctor Who: Vastra Investigates - A Christmas Prequel (2005) (which has a duplicate IMDB listing as a TV movie,
Doctor Who: Vastra Investigates - A Christmas Prequel (2005)). The prequel segues directly into the Christmas special,
The Snowmen (2012).
