Hell Hath No Fury was the 2nd episode of the 1st series of The Mary Morstan Mysteries. It originally aired September 1st 2012. A remastered version came out on 24th September 2017 with improved colouring, pacing, and the inclusion of some deleted scenes.
In the episode, Sherlock's brother, Mycroft, comes to him concerning the governments concerns over what is essentially an early form of the Suffragette movement, who are actually secretly run by Moriarty and his niece Gwendolyn. Unable to infiltrate the movement him self, Holmes persuades Mary Morstan to go in his place. Watson initially objects to Mary being involved in such a dangerous position, but is soon removed from the picture by leaving the country for Scotland, supposedly for a lucrative position of looking after renown monster hunter, Lord Porridge of Fife, following his illness after falling into Loch Ness chasing Nessie.
Watson then spends the entire rest of the episode looking for Castle Porridge, only to find. It does not exist.
With Watson out of the way, Mary takes up the position and is able to secure herself a position in the woman's rights movements. She discovers they are not the peace seeking group they claim to be, but are, in fact, intending to blow up Parliament with bombs stowed away in cakes. Eventually, the day is saved by Mary's bravery.
Sherlock Holmes: Ross K. Foad
Mycroft Holmes: James Ian Gray
Charlotte Chambers: Emma Lillie Lees
Mrs Hudson: Linda-Jean Barry