The WORST episodes of Layton Mystery Detective Agency: Kat's Mystery‑Solving Files

Every episode of Layton Mystery Detective Agency: Kat's Mystery‑Solving Files ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Layton Mystery Detective Agency: Kat's Mystery‑Solving Files!

Professor Layton's daughter, Katrielle Layton, runs the Layton Detective Agency together with the talking dog Sherl and her assistant Ernest, and solves strange cases that happen everyday in London. Originally, she started the job with the purpose of finding her father, Hershel Layton, who had disappeared suddenly, but her incredible ability to solve puzzles made her well-known and she receives numerous requests.

Last Updated: 3/6/2023Network:Fuji TV
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Professor Layton and the Relics Treasure: Episode 5
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#1 - Professor Layton and the Relics Treasure: Episode 5

Season 1 - Episode 49 - Aired 3/24/2019

In the wake of having located Luke and the Professor, Katrielle's investigatory instincts refuse to let her rest, compelling the team to follow the trail of the mysterious "Aldebaran" to his palatial home.

Katrielle and the Great Office Infiltration Strategy
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#2 - Katrielle and the Great Office Infiltration Strategy

Season 1 - Episode 23 - Aired 9/16/2018

One of the famous Seven Dragons requests the team's investigative attentions after discovering a love letter written by his much-adored daughter, Allie.

The Clockwork Sweets
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#3 - The Clockwork Sweets

Season 1 - Episode 24 - Aired 9/23/2018

Hastings employs the Agency's efforts in the search for a hand belonging to Big Ben in the hope of recovering it before the arrival of a foreign ambassador.

Katrielle and the Nessie of Loch Nem
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#4 - Katrielle and the Nessie of Loch Nem

Season 1 - Episode 29 - Aired 10/28/2018

The Agency trio travel to the Highlands to investigate recent sightings of a strange "Nessie" creature at Loch Nem.

Katrielle and the Immortal Vampire
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#5 - Katrielle and the Immortal Vampire

Season 1 - Episode 30 - Aired 11/4/2018

A new client, Hans, approaches the Agency after an encounter with an old friend whose appearance has seemingly remained unchanged after thirty-five years.

Katrielle and the Witch Wife
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#6 - Katrielle and the Witch Wife

Season 1 - Episode 31 - Aired 11/11/2018

Strange goings-on in a domestic household lead the Agency's latest client to seek their advice on whether or not his wife has become a witch.

Katrielle and the Prince of the Stars
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#7 - Katrielle and the Prince of the Stars

Season 1 - Episode 32 - Aired 11/18/2018

Katrielle takes on the task of reuniting a young woman with the object of her affections, a man who claimed to hail from another planet.

Katrielle and the Murder on the Spaceship Bengarian
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#8 - Katrielle and the Murder on the Spaceship Bengarian

Season 1 - Episode 33 - Aired 11/25/2018

Bengary challenges the Agency team to solving their most ambitious case yet: a murder mystery from the realm of his own imagination.

Professor Layton and the Relics Treasure: Episode 3
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#9 - Professor Layton and the Relics Treasure: Episode 3

Season 1 - Episode 34 - Aired 12/2/2018

On the tail of the fabled Relics, the Professor and Luke of eleven years prior close in on a shadowy figure, while Katrielle and co. trace their whereabouts in the present.

Professor Layton and the Relics Treasure: Episode 4
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#10 - Professor Layton and the Relics Treasure: Episode 4

Season 1 - Episode 35 - Aired 12/9/2018

The paths of the two parties converge in Southampton as the final hours before the duo's disappearance count down.

The Cursed London Collection
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#11 - The Cursed London Collection

Season 1 - Episode 36 - Aired 12/16/2018

Angel Arrow CEO Bergman calls on the Agency after the label's four showcase dresses vanish two nights before the world's biggest fashion show.

Mintan's New Ambition
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#12 - Mintan's New Ambition

Season 1 - Episode 37 - Aired 12/23/2018

The Agency is visited by Mintan's fellow farmworkers, seeking the team's help after a sudden personality change in their old friend transformed him from hard-working farmer to rude gambler with an improbable perfect winning streak.

The Scotland Yard Bayside Shakedown
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#13 - The Scotland Yard Bayside Shakedown

Season 1 - Episode 38 - Aired 1/6/2019

Katrielle joins a Scotland Yard blockade erected around a bridge due for demolition after a giant robot constructed by Bengary takes up residence. With the robot incapable of normal communication, Katrielle must figure out both how to get through to it and what the nature of its goal might be.

Katrielle and the Transparent Baby
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#14 - Katrielle and the Transparent Baby

Season 1 - Episode 39 - Aired 1/13/2019

An Agencybound Katrielle receives a call from babysitter Kelly, whose concerns about her latest assignation appearing to include an invisible infant prompt the unflappable investigator to attempt to conduct a full inquiry over the phone.

Geraldine Royer and the Final Customer
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#15 - Geraldine Royer and the Final Customer

Season 1 - Episode 40 - Aired 1/20/2019

Spurred by a horoscope warning that the only recourse to having "the worst day of the decade" might be to spend it with a friend, Katrielle decides to meet with Emiliana at a local café, unaware that the adroit analyst has her own plans. Emiliana challenges Katrielle to guess the professions of their fellow customers, pitting the former's highly professional profiling skill squarely against the latter's esoteric and intuitive investigation methods.

Katrielle and the Strange Spirit Photo
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#16 - Katrielle and the Strange Spirit Photo

Season 1 - Episode 41 - Aired 1/27/2019

In the wake of discovering a recurring phantom figure appearing in his images, London Times photographer Pete contacts the Agency, fearing that he has fallen victim to a curse.

Great Detective Sherlo Ckholmes
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#17 - Great Detective Sherlo Ckholmes

Season 1 - Episode 42 - Aired 2/3/2019

Tired of being treated like the Agency dogsbody, Sherl jumps at the chance to conduct his own investigation into the reported death of a beloved member of the neighbourhood pack.

Katrielle and Horror Castle VR
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#18 - Katrielle and Horror Castle VR

Season 1 - Episode 43 - Aired 2/10/2019

The Agency trio are recruited by the head Dragon with the goal of completing a "virtual reality game".

Katrielle and the Superman Chef
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#19 - Katrielle and the Superman Chef

Season 1 - Episode 44 - Aired 2/17/2019

After an incident involving an all-you-can-eat restaurant opening and Katrielle's insatiable appetite, the eager investigator accepts the offer of a cook-off challenge to settle her debt.

Katrielle and the Ghost Club
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#20 - Katrielle and the Ghost Club

Season 1 - Episode 45 - Aired 2/24/2019

The youngest of the Dragons invites Katrielle and a selection of her acquaintances to compete in a game of "Ghost Escape".

Katrielle and the Hundred Faces of Mona Lisa
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#21 - Katrielle and the Hundred Faces of Mona Lisa

Season 1 - Episode 46 - Aired 3/3/2019

The Agency trio's trip to the Marylebone Museum of Art to see the famous Mona Lisa takes a strange turn when Katrielle is informed that the museum's entire collection has been surreptitiously replaced with an array of Lisa-centric works.

The Millionaire Ariadne's Conspiracy (Part 1)
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#22 - The Millionaire Ariadne's Conspiracy (Part 1)

Season 1 - Episode 47 - Aired 3/10/2019

Receiving an invitation addressed to her father requesting attendance of puzzle-solving event hosted by the mysterious Ariadne, Katrielle and company find themselves reunited with all seven of the renowned London millionaires at the deserted mansion of a deceased magnate.

The Millionaire Ariadne's Conspiracy (Part 2)
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#23 - The Millionaire Ariadne's Conspiracy (Part 2)

Season 1 - Episode 48 - Aired 3/17/2019

Katrielle realises that the Seven Dragons are hiding a secret, and as she pieces everything together, the true identity of Lord Adamas is revealed.

Katrielle and the Phantom Thief of the Century
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#24 - Katrielle and the Phantom Thief of the Century

Season 1 - Episode 4 - Aired 4/29/2018

Inspector Hastings enlists the Agency's assistance in tracking down a serial jewel thief before the criminal can enact their most daring heist yet.

The Lonely Ghost
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#25 - The Lonely Ghost

Season 1 - Episode 19 - Aired 8/12/2018

The team are summoned by a young heiress whose estate is seemingly being haunted by a host of ethereal apparitions.

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