Layton Mystery Detective Agency: Kat's Mystery‑Solving Files

Season 12018

The story is set in London and follows Katrielle as she solves mysteries with her talking dog Sherl.

50 Episodes

E01 Katrielle and the Mysterious House

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.

April 8, 2018

E02 Katrielle and the Devil's Dress

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.

April 15, 2018

E03 Katrielle and the Resurrected Corpses

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.

April 22, 2018

E04 Katrielle and the Phantom Thief of the Century

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

April 29, 2018

E05 Katrielle and the Lucky Man

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.

May 6, 2018

E06 The Bus that Leapt Through Time

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.

May 13, 2018

E07 Ratman Returns

The Agency is visited by a young boy named Leo who fears that the mysterious hero of London's streets, Ratman, has been kidnapped.

May 20, 2018

E08 The 100 Million Pounds that Left with the Wind

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.

May 27, 2018

E09 Cat-Colored Skyscrapers

Katrielle is called to the estate of a millionaire gourmet with an unusual request: her pet has gone missing, and she wants it found before her dinner party commences.

June 3, 2018

E10 Professor Layton and the Relics Treasure: Episode 1

Rosa, an old acquaintance of Katrielle's father, visits the Agency with information relating to the Professor's disappearance eleven years ago.

June 10, 2018

E11 Mystery at New Cinema Paradise

The Agency attend the premier of a much-anticipated film, only to discover mid-scene that the moment of the climactic kiss has disappeared from the reel.

June 17, 2018

E12 Aspoirot and London's Holiday

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.

June 24, 2018

E13 Katrielle and the Doppelgänger

Katrielle takes on a new case involving a young pianist who is being plagued by appearances of a doppelgänger.

July 1, 2018

E14 Genius Analyst Officer Geraldine Royer

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

July 8, 2018

E15 Katrielle and the Mystery Circles

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

July 15, 2018

E16 Katrielle and the Pandas' March

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

July 22, 2018

E17 Katrielle and the Monster of London

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

July 29, 2018

E18 Molentary Express and Three Incidents

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.

August 5, 2018

E19 The Lonely Ghost

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

August 12, 2018

E20 Professor Layton and the Relics Treasure: Episode 2

Rosa returns to continue her story, and reveals the link between Katrielle's origins and the Professor's disappearance.

August 19, 2018

E21 Katrielle and the Sweet-Scented Street Labyrinth

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.

August 26, 2018

E22 Ultra-High Performance Robot Socketman

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

September 2, 2018

E23 Katrielle and the Great Office Infiltration Strategy

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

September 16, 2018

E24 The Clockwork Sweets

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.

September 23, 2018

E25 A Riverside Festival Love Story

Katrielle joins an investigation at London's Riverside Festival into a tragic incident that took place on the banks of the River Thames, mirroring a local legend.

September 30, 2018

E26 The Diary of Noah

Ernest recounts the time he was accused of stealing valuable research papers on his first day at Gressenheller University, and his resultant first encounter with Katrielle.

October 7, 2018

E27 Fugitive Katri

The Agency team are forced to go on the run from the law after Katrielle finds herself the prime suspect in a murder investigation.

October 14, 2018

E28 The Goddess of the Thames Smiles a Second Time

Katrielle finds yet another mystery on her hands when a celebratory treasure hunt held on a luxury cruise ship's inaugural voyage goes awry.

October 21, 2018

E29 Katrielle and the Nessie of Loch Nem

The Agency trio travel to the Scottish Highlands after receiving a request to investigate recent sightings of the famous "Nessie" creature on the waters of Loch Nem.

October 28, 2018

E30 Katrielle and the Immortal Vampire

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

November 4, 2018

E31 Katrielle and the Witch Wife

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

November 11, 2018

E32 Katrielle and the Prince of the Stars

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.

November 18, 2018

E33 Katrielle and the Murder on the Spaceship Bengarian

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

November 25, 2018

E34 Professor Layton and the Relics Treasure: Episode 3

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.

December 2, 2018

E35 Professor Layton and the Relics Treasure: Episode 4

The paths of the parties past and present converge in Southampton, as the final hours before the duo's disappearance count down.

December 9, 2018

E36 The Cursed London Collection

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.

December 16, 2018

E37 Mintan's New Ambition

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 agronomist to obnoxious gambler sporting an improbable winning streak.

December 23, 2018

E38 Dancing Scotland Yard Great Investigation Line

Katrielle joins a Scotland Yard blockade erected around a bridge due for demolition after Bengary's latest Sketman, Punch, takes up residence. With the giant robot incapable of vocal communication, Katrielle must figure out the reason behind its behavior to put an end to the standoff.

January 6, 2019

E39 Katrielle and the Invisible Baby

An Agencybound Katrielle receives a call from babysitter Kelly, whose concerns are centered around her latest assignation appearing to include an invisible infant.

January 13, 2019

E40 Geraldine Royer and the Final Customer

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 spend the day with Emiliana at a local café, unaware that the adroit analyst has her own plans. Emiliana challenges Katrielle to play at guessing the professions of their fellow customers, pitting the former's highly professional profiling skill squarely against the latter's esoteric and impulsive investigation methods.

January 20, 2019

E41 Katrielle and the Strange Spirit Photo

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.

January 27, 2019

E42 Great Detective Sherl O.C. Kholmes

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 neighborhood pack.

February 3, 2019

E43 Katrielle and Horror Castle VR

The Agency trio are recruited by an old client with the goal of completing a challenging "virtual reality game".

February 10, 2019

E44 Katrielle and the Superman Chef

After an incident involving a misunderstood "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.

February 17, 2019

E45 Katrielle and the Ghost Club

Supernatural superfan Andrea, youngest of the seven millionaires, invites Katrielle and a selection of her acquaintances to compete in a game of "Ghost Escape".

February 24, 2019

E46 Katrielle and the Hundred Faces of Mona Lisa

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.

March 3, 2019

E47 The Millionaire Ariadne's Conspiracy (1)

Receiving an invitation addressed to her father requesting attendance of a 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.

March 10, 2019

E48 The Millionaire Ariadne's Conspiracy (2)

With the realisation that the Seven are hiding a secret, Katrielle's investigation takes an unexpected turn, and as she pieces together the mystery, the true identity of their host is revealed.

March 17, 2019

E49 Professor Layton and the Relics Treasure: Episode 5

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 in search of answers.

March 24, 2019

E50 Professor Layton and the Relics Treasure: Final Episode

The two parties united at last, their long journey comes to a climactic conclusion in a fateful showdown at the Greenwich Observatory with the man behind the entire conspiracy.

March 31, 2019

Layton Mystery Detective Agency: Kat's Mystery‑Solving Files

E01 Katrielle and the Mysterious House

E02 Katrielle and the Devil's Dress

E03 Katrielle and the Resurrected Corpses

E04 Katrielle and the Phantom Thief of the Century

E05 Katrielle and the Lucky Man

E06 The Bus that Leapt Through Time

E07 Ratman Returns

E08 The 100 Million Pounds that Left with the Wind

E09 Cat-Colored Skyscrapers

E10 Professor Layton and the Relics Treasure: Episode 1

E11 Mystery at New Cinema Paradise

E12 Aspoirot and London's Holiday

E13 Katrielle and the Doppelgänger

E14 Genius Analyst Officer Geraldine Royer

E15 Katrielle and the Mystery Circles

E16 Katrielle and the Pandas' March

E17 Katrielle and the Monster of London

E18 Molentary Express and Three Incidents

E19 The Lonely Ghost

E20 Professor Layton and the Relics Treasure: Episode 2

E21 Katrielle and the Sweet-Scented Street Labyrinth

E22 Ultra-High Performance Robot Socketman

E23 Katrielle and the Great Office Infiltration Strategy

E24 The Clockwork Sweets

E25 A Riverside Festival Love Story

E26 The Diary of Noah

E27 Fugitive Katri

E28 The Goddess of the Thames Smiles a Second Time

E29 Katrielle and the Nessie of Loch Nem

E30 Katrielle and the Immortal Vampire

E31 Katrielle and the Witch Wife

E32 Katrielle and the Prince of the Stars

E33 Katrielle and the Murder on the Spaceship Bengarian

E34 Professor Layton and the Relics Treasure: Episode 3

E35 Professor Layton and the Relics Treasure: Episode 4

E36 The Cursed London Collection

E37 Mintan's New Ambition

E38 Dancing Scotland Yard Great Investigation Line

E39 Katrielle and the Invisible Baby

E40 Geraldine Royer and the Final Customer

E41 Katrielle and the Strange Spirit Photo

E42 Great Detective Sherl O.C. Kholmes

E43 Katrielle and Horror Castle VR

E44 Katrielle and the Superman Chef

E45 Katrielle and the Ghost Club

E46 Katrielle and the Hundred Faces of Mona Lisa

E47 The Millionaire Ariadne's Conspiracy (1)

E48 The Millionaire Ariadne's Conspiracy (2)

E49 Professor Layton and the Relics Treasure: Episode 5

E50 Professor Layton and the Relics Treasure: Final Episode

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E01 Katrielle and the Mysterious House

E02 Katrielle and the Devil's Dress

E03 Katrielle and the Resurrected Corpses

E04 Katrielle and the Phantom Thief of the Century

E05 Katrielle and the Lucky Man

E06 The Bus that Leapt Through Time

E07 Ratman Returns

E08 The 100 Million Pounds that Left with the Wind

E09 Cat-Colored Skyscrapers