Season
Season 1 Episode
- Season 1 Katrielle and the Mysterious House
- Season 1 Katrielle and the Devil's Dress
- Season 1 Katrielle and the Resurrected Corpses
- Season 1 Katrielle and the Phantom Thief of the Century
- Season 1 Katrielle and the Lucky Man
- Season 1 The Bus that Leapt Through Time
- Season 1 Ratman Returns
- Season 1 The 100 Million Pounds that Left with the Wind
- Season 1 Cat-Colored Skyscrapers
- Season 1 Professor Layton and the Relics Treasure: Episode 1
- Season 1 Mystery at New Cinema Paradise
- Season 1 Aspoirot and London's Holiday
- Season 1 Katrielle and the Doppelgänger
- Season 1 Genius Analyst Officer Geraldine Royer
- Season 1 Katrielle and the Mystery Circles
- Season 1 Katrielle and the Pandas' March
- Season 1 Katrielle and the Monster of London
- Season 1 Molentary Express and Three Incidents
- Season 1 The Lonely Ghost
- Season 1 Professor Layton and the Relics Treasure: Episode 2
- Season 1 Katrielle and the Sweet-Scented Street Labyrinth
- Season 1 Ultra-High Performance Robot Socketman
- Season 1 Katrielle and the Great Office Infiltration Strategy
- Season 1 The Clockwork Sweets
- Season 1 A Riverside Festival Love Story
- Season 1 The Diary of Noah
- Season 1 Fugitive Katri
- Season 1 The Goddess of the Thames Smiles a Second Time
- Season 1 Katrielle and the Nessie of Loch Nem
- Season 1 Katrielle and the Immortal Vampire
- Season 1 Katrielle and the Witch Wife
- Season 1 Katrielle and the Prince of the Stars
- Season 1 Katrielle and the Murder on the Spaceship Bengarian
- Season 1 Professor Layton and the Relics Treasure: Episode 3
- Season 1 Professor Layton and the Relics Treasure: Episode 4
- Season 1 The Cursed London Collection
- Season 1 Mintan's New Ambition
- Season 1 Dancing Scotland Yard Great Investigation Line
- Season 1 Katrielle and the Invisible Baby
- Season 1 Geraldine Royer and the Final Customer
- Season 1 Katrielle and the Strange Spirit Photo
- Season 1 Great Detective Sherl O.C. Kholmes
- Season 1 Katrielle and Horror Castle VR
- Season 1 Katrielle and the Superman Chef
- Season 1 Katrielle and the Ghost Club
- Season 1 Katrielle and the Hundred Faces of Mona Lisa
- Season 1 The Millionaire Ariadne's Conspiracy (1)
- Season 1 The Millionaire Ariadne's Conspiracy (2)
- Season 1 Professor Layton and the Relics Treasure: Episode 5
- Season 1 Professor Layton and the Relics Treasure: Final Episode
Layton Mystery Detective Agency: Kat's Mystery‑Solving Files - Season 1 Episode 26 The Diary of Noah
7.50 24 minutes 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.
