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: 2/20/2025Network: Fuji TVStatus: Ended

Katrielle and the Phantom Thief of the Century

5.75

4 votes

#1 - 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.

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6.50

2 votes

#2 - Katrielle and the Monster of London

Season 1 - Episode 17 - Aired 7/29/2018

Hastings turns to the Agency trio when London is menaced by a mysterious growling giant lurking in the fog.

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6.50

2 votes

#3 - Katrielle and the Pandas' March

Season 1 - Episode 16 - Aired 7/22/2018

Katrielle investigates a young girl on behalf of her concerned mother, who believes her daughter is able to predict the future.

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6.50

2 votes

#4 - Katrielle and the Mystery Circles

Season 1 - Episode 15 - Aired 7/15/2018

The Agency receives a new mystery to solve when a young farmer details the unexplained appearance of strange patterns in their wheat fields.

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The 100 Million Pounds that Left with the Wind

6.50

2 votes

#5 - The 100 Million Pounds that Left with the Wind

Season 1 - Episode 8 - Aired 5/27/2018

The team are summoned by Inspector Hastings to the site of a seemingly impossible burglary: one hundred million pounds have vanished from a high-tech bank vault.

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6.67

3 votes

#6 - Genius Analyst Officer Geraldine Royer

Season 1 - Episode 14 - Aired 7/8/2018

Katrielle and co. are left puzzled when Hastings requests their help on a case where the culprit has already been uncovered.

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6.67

3 votes

#7 - Aspoirot and London's Holiday

Season 1 - Episode 12 - Aired 6/24/2018

Relaxing on a public holiday, the Agency team become embroiled in a highly unusual case when a desperate Inspector Hastings pleads their aid in finding a last-minute gift for his wife's birthday.

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6.83

6 votes

#8 - Katrielle and the Mysterious House

Season 1 - Episode 1 - Aired 4/8/2018

Katrielle Layton, an intrepid investigator who heads up the three strong team at the Layton Detective Agency alongside her assistants Ernest and Sherl, takes on a case involving a mysterious house in which a new tenant's family suddenly and inexplicably disappeared.

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7.00

1 votes

#9 - 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.

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7.00

3 votes

#10 - Katrielle and the Lucky Man

Season 1 - Episode 5 - Aired 5/6/2018

The team becomes involved in a new case when a young man approaches the Agency in the hope of discovering a way to resume an implausible lucky streak.

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7.00

2 votes

#11 - The Bus that Leapt Through Time

Season 1 - Episode 6 - Aired 5/13/2018

Katrielle stumbles upon a fresh mystery when a classmate of Ernest relates the story of a mysterious bus journey that seemingly transported them back to the time of their childhood.

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7.00

2 votes

#12 - Molentary Express and Three Incidents

Season 1 - Episode 18 - Aired 8/5/2018

Travelling on board the Molentary Express for a special solar eclipse tour, the team find their attention divided when clients old and new describe a sequence of strange events.

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7.00

2 votes

#13 - 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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7.00

2 votes

#14 - Ultra-High Performance Robot Socketman

Season 1 - Episode 22 - Aired 9/2/2018

Katrielle is invited to the unveiling of Agency acquaintance and child genius Bengary's latest invention: Socketman, a robotic renaissance-manservant.

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Katrielle and the Great Office Infiltration Strategy

7.00

1 votes

#15 - 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.

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7.00

1 votes

#16 - 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.

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7.00

1 votes

#17 - 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.

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7.00

1 votes

#18 - 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.

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7.00

1 votes

#19 - 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.

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7.00

1 votes

#20 - 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.

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7.00

1 votes

#21 - 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.

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Katrielle and the Hundred Faces of Mona Lisa

7.00

1 votes

#22 - 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.

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7.20

5 votes

#23 - Katrielle and the Resurrected Corpses

Season 1 - Episode 3 - Aired 4/22/2018

A young woman named Liv seeks Katrielle's help after she is visited by her late husband, Andy, apparently returned to life as a zombie.

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7.20

5 votes

#24 - Katrielle and the Devil's Dress

Season 1 - Episode 2 - Aired 4/15/2018

Katrielle is approached by Pastel, a struggling musician, who claims that a strange dress he bought for his wife Olivia is causing her to become possessed.

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Katrielle and the Sweet-Scented Street Labyrinth

7.50

2 votes

#25 - Katrielle and the Sweet-Scented Street Labyrinth

Season 1 - Episode 21 - Aired 8/26/2018

In search of sweets of legendary reputation, Katrielle is hooked when she is told that she will have to prove her connoisseur qualifications by locating the nearby store herself.

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