Undead Murder Farce: Season 1, Episode 5 - The Immortal of London (2023)

Aya and Tsugaru arrive in London and are drawn into a new case when they cross paths with Sherlock Holmes and Dr. Watson, while Arsène Lupin prepares a theft involving the black diamond called the Penultimate Night. Lupin has already sent a formal warning to its owner, Phineas Fogg, naming the exact time he intends to strike, and that advance notice leads Fogg to turn his home into a fortress with a huge guard force, including dozens of Scotland Yard officers, and to hire Sherlock Holmes and Aya Rindo as extra detectives.

When Aya, Tsugaru, Sherlock, Watson, and Shizuka are brought into Fogg's mansion, there is an initial misunderstanding between the groups, but it is quickly smoothed over and they are allowed inside. Two Royce agents are also present, reflecting the organization's interest in the case and in supernatural threats. Fogg then takes the gathered investigators down into the basement and reveals the Penultimate Night inside an ornate silver case, explaining that it is a magical artifact made by dwarves in the 1200s and that the writing on it warns of a wolf dwelling within.

As the night of the planned theft begins, the mansion is treated like a heavily defended trap. Sherlock and Aya examine the situation from different angles, while Tsugaru is used as the physical safeguard and Shizuka stays close by to support Aya's bodyless condition. Lupin does not come alone: he is working with the Phantom of the Opera, who provides him with additional help for the heist.

Lupin and the Phantom set off the first major breach by causing an explosion outside the mansion, and the blast damages the moat area in a way that makes water begin leaking into the air system. That sabotage is not just a distraction; it starts interfering with the security of the house from the inside, turning the mansion itself into part of the threat as the defenses begin to fail in unexpected ways.

With the house destabilized, the thieves push forward on their attempt to reach the diamond. The defenders realize that Lupin's warning was not a bluff but part of a deliberate strategy to force everyone into a vulnerable, overconfident position while he and the Phantom exploit the mansion's structure and security layout. Aya and Sherlock continue working through the clues and the behavior of the house staff and guards, trying to identify how the breach is being accomplished and where the real danger lies.

The episode's tension centers on the fact that the Penultimate Night is not an ordinary jewel but a dangerous supernatural object, and Fogg's earlier explanation about the wolf inside becomes increasingly relevant as the infiltration unfolds. The theft attempt, the explosive sabotage, and the pressure on the defenders all build toward the realization that the case is larger than a simple robbery: Lupin's objective is tied to the jewel's hidden nature, and the mansion's defenses are now being challenged by both human planning and supernatural consequences.

At the end of Episode 5, the mansion's stolen prize is no longer secure, the night's mystery has been disrupted, and the people gathered there are pushed into a deeper conflict with Lupin's intrusion and the larger struggle around the Penultimate Night. Aya and Tsugaru end the episode having been drawn fully into the London case, while the thieves, servants, and protectors around the mansion are left reacting to the chaos that has unfolded.

The episode opens the next stage of the London story with the sense that a new case has begun, not resolved. Aya and Tsugaru arrive in the circle of Phileas Fogg and the people connected to the mansion, and the atmosphere is tense from the start because of the warning that a thief is coming. The mansion is preparing around the object called the Penultimate Night, and everyone's attention is fixed on protecting it. The warning is not idle: the threat of Arsène Lupin hangs over the entire evening, and the people present understand that if he appears, the night will turn into a contest of deception, movement, and force.

As the evening proceeds, the situation becomes more immediate and more physical. The people in the mansion are not simply waiting; they are actively responding to a planned theft. The episode builds its ending out of that pressure, with the gathered characters trying to stay ahead of a criminal who has already shaped the terms of the encounter by announcing himself in advance. Aya watches the event as a detective, Tsugaru moves as the one who can act when violence breaks out, and the mansion's defenders are forced into a state of alertness where every room and every movement matters.

By the end, the theft is not a neat, finished event but the opening of a larger contest. The power balance inside the mansion has been shaken, and the episode ends on the feeling that the characters have entered a deeper and more dangerous game. Aya remains focused on uncovering what is happening and why, Tsugaru remains at her side as the one who can confront threats directly, and the people tied to the mansion are left with the immediate task of responding to the intrusion rather than resting in any sense of safety.

For the main characters at the end of the episode: Aya ends up still active in the case, present as the mind of the investigation and still seeking the truth behind the theft and the larger mystery. Tsugaru ends up engaged as her protector and enforcer, ready to confront whatever comes next. Phileas Fogg remains tied to the unfolding conflict as the man around whom the London case is gathering. Arsène Lupin remains the threatening force driving the episode's climax, having pushed the story into crisis. The mansion's other defenders and residents end the episode caught in the aftermath of that threat, with their situation unsettled and their responsibility unchanged: the Penultimate Night must still be protected, and the danger is not over.

Yes. Episode 5 has a brief post-credits-style reveal: the end credits identify the mysterious old man from the previous episode's London setup as James Moriarty through the cast listing, confirming his identity before the next story beat.

In the episode itself, the main ending already shifts toward the London case: Aya and Tsugaru are drawn into the "Penultimate Night" theft plot, while the final moments move the investigation toward London rather than wrapping with a separate animated bonus scene.

In episode 5, Aya is already traveling with Tsugaru and Shizuku as the trio reaches London and is drawn into a new mystery after encountering a famous detective pair. The setup makes Aya's role central from the start because she is the sharp-tongued strategist whose headless body and investigative instinct drive the group's participation in the case.

Tsugaru matters because he functions as the group's physical enforcer and public-facing investigator while Aya directs the reasoning. In this episode, his presence becomes especially important as the team navigates London's criminal underworld and supernatural threats, with the story emphasizing his mobility, combat ability, and role as the person who can act when a confrontation becomes unavoidable.

Shizuku serves as Aya's loyal attendant and the practical support that keeps the trio operating smoothly in a foreign city. In the London episode, she is part of the group that meets the new case together, and her role is tied to maintaining order, assisting Aya, and helping the team function as a cohesive investigative unit.

Episode 5 introduces the pair of famous London detectives connected to the new case, most notably Sherlock Holmes and his circle. The episode's conflict is shaped by the trio's meeting with these high-profile figures, who immediately place Aya and Tsugaru in a larger contest of deduction, reputation, and competing investigations.

The title points to the episode's focus on characters whose survival, identity, or physical condition is tied to supernatural persistence. Aya's own existence as a disembodied immortal head makes the episode especially resonant, because her personal quest for her missing body parallels the broader London mystery and keeps the story grounded in her specific condition.

This episode is not family friendly for young children, as it carries official age ratings of 12 (or -12), indicating it is intended for teenagers and adults rather than a general family audience.

Potentially objectionable or upsetting aspects for children or sensitive viewers include:

• Supernatural horror themes involving vampires, undead creatures, and body horror, which can be frightening or disturbing.
• Depictions of murder and violent crime scenes, including a vampire's wife being killed, presented in a mystery-thriller context.
• Brief moments of intense fear or screaming, such as characters reacting to supernatural threats or dangerous situations.
• Visual elements involving a detective who is a disembodied head carried in a cage, which may be unsettling or confusing for young children.
• Dark and suspenseful tone throughout, with themes of death, immortality, and moral ambiguity that are more appropriate for mature audiences.

No plot spoilers are revealed, but the general atmosphere and content suggest the episode is best suited for viewers aged 12 and up.