[s1e12] M. «iOS SAFE»

Known only as "M," the killer is a ruthless hitman who disguises his professional hits as the random acts of a serial killer, often leaving behind large pools of his victims' blood.

In this episode, a serial killer from Sherlock's past in London appears to have followed him to New York. [S1E12] M.

The episode moves away from the "case of the week" format and firmly establishes the series' overarching mythology. Known only as "M," the killer is a

This revelation leads Sherlock to the realization that Moran is just a "dragon" for a much more dangerous employer: the legendary Moriarty . Why This Episode Matters This revelation leads Sherlock to the realization that

Emotionally, the episode is defined by Joan Watson's choice. Despite her contract ending, she chooses to stay with Sherlock pro bono because she finds his work fascinating and believes she can truly help him.

If you are looking for an interesting guide to , the most prominent and high-stakes "M" episode in television belongs to the crime drama Elementary .

After Sherlock tracks down and captures the man he believes is M—a British thug named Sebastian Moran (played by Vinnie Jones)—he discovers that Moran could not have killed Irene.