The episode further distinguishes Moriarty's "principled" crime from the "pointless" cruelty of the copycats.
This episode, titled serves as a fascinating study on the manipulation of public perception and the burden of necessary evil . While its surface plot revolves around catching a "fake" Jack the Ripper, the underlying essay it presents is far more complex, focusing on how a shared enemy can force unity even between bitter rivals. The Power of the "Common Enemy" YuukokuNoMoriarty2_Ep_05_SUB_ITA.mp4
: By having the real Jack the Ripper (Renfield) expose himself, Moriarty forces the bickering Scotland Yard and the local Vigilance Committee to stop fighting each other and focus on a single target. YuukokuNoMoriarty2_Ep_05_SUB_ITA.mp4