The Strange Case of the End of Civilization as We Know It

Dr. Gropinger is a parody of Henry Kissinger, and the assassins mistake him for an enemy due to his confused arrival where he greets the congregation in Hebrew. The murder is claimed by Moriarty to send a message about his capability to eliminate anyone, establishing the threat level early in the film.

Mrs. Hudson is revealed to be Moriarty's grandchild and the mastermind behind the plot to destroy civilization. She masquerades as Holmes's landlady while secretly orchestrating the murder of committee members and framing the Watson doppelgänger scheme.

Holmes uses his deductive skills to identify the real Watson, though the exact method isn't detailed in the summary. The key challenge is that Moriarty's grandchild is a perfect doppelgänger, making visual identification impossible. Holmes likely relies on behavioral cues or knowledge only the real Watson would have.

Mrs. Hudson seeks revenge for her grandfather Moriarty's death. She explains during the confrontation that her long-brewing vendetta stems from Moriarty's execution, and she plans to destroy civilization as payback for ending his life.

Yes, Holmes dies in the final twist. After Mrs. Hudson shoots Watson and riddles Holmes with bullets, he gloats that he anticipated the betrayal and had Watson load the gun with blanks. However, Watson confesses he forgot to switch the bullets, and Holmes realizes he's been shot with real ammunition. He dies from his wounds.

Watson's character is established as an utter fool and bumbling descendant of Dr. Watson. His incompetence is a running theme throughout the film, from causing the Commissioner's death to forgetting the crucial bullet switch. This fatal mistake is consistent with his characterization as perpetually incompetent.

Moriarty's grandchild, Mrs. Hudson, continues his legacy by orchestrating a world domination scheme. She kills committee members through her Watson doppelgänger, manipulates events from behind the scenes as Holmes's landlady, and plans to annihilate civilization to fulfill her grandfather's threat.

With most of the committee killed by a sniper and leadership decimated, Holmes devises an unconventional plan. He invites famous detectives like Columbo, Hercule Poirot, and Sam Spade to a party, reasoning that Moriarty wouldn't be able to resist the opportunity to eliminate his rivals all at once.

The Commissioner is murdered while attempting to depart, and his death is attributed to Watson's rampant stupidity and bumbling. While the exact mechanism isn't detailed, Watson's incompetence during the departure directly leads to the Commissioner's vulnerability and subsequent killing.

Holmes and Watson work on a crossword puzzle during the detective party. This serves as both a comedic element showcasing their eccentric behavior and a red herring - while they appear relaxed, the actual detection work and murder investigation unfold around them.

After receiving the threatening letter signed by Moriarty claiming responsibility for Gropinger's murder and promising world domination, the President dispatches a top agent to coordinate with international law enforcement in London. The goal is to unite global efforts to stop Moriarty before his plan advances.

The Watson doppelgänger is actually Moriarty's grandchild in disguise. This person, Mrs. Hudson in her true form, uses the impersonation to infiltrate Holmes's inner circle and carry out murders while avoiding suspicion. The perfect resemblance allows her to create chaos during the critical party sequence.