Murder Most Horace was the 3rd episode of the 2nd series of The Mary Morstan Mysteries. It originally ran in two parts between 26th August-30th August 2014.
In the episode, Mary Morstan's alter ego "Horace Moustachio" gets accused of murder. Can Mary prove his/her innocence? Or is this the end for poor Horace?
Sherlock Holmes: Ross K. Foad