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Series · 2026 · Animation

The Case Book of Arne

★6.5 2026 1 Season TV-MA

Louis Hartmann loses his father, a private detective investigating a string of murders, leaving him all alone. Rumor has it that the murders are the work of a Grave-Digger Vampire. Louis isn’t keen on superstitions and vows to catch the culprit himself. That is, until a self-proclaimed detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, appear. A new door is about to open for Louis…

Seasons & episodes

1 season · 12 episodes

Those Who Dig Pits for Others Will Fall In Themselves

Episode 01

Those Who Dig Pits for Others Will Fall In Themselves

Jan 7, 2026 · 23 min

Louis Hartmann joins forces with the members of the Arne Detective Agency to investigate his father's murder.

There Is Always Sunshine After the Rain

Episode 02

There Is Always Sunshine After the Rain

Jan 14, 2026 · 22 min

Lynn remembers the time she first met Arne and hired him to help investigate her father's suspicious behavior.

Misfortune Never Visits Alone

Episode 03

Misfortune Never Visits Alone

Jan 21, 2026 · 23 min

Arne makes a shocking discovery about Lynn's father and Gordon reveals the dark truth of the Reinweiß mansion.

Those Who Never Gamble Never Win

Episode 04

Those Who Never Gamble Never Win

Jan 28, 2026 · 22 min

Lynn and Arne are both troubled by surprise encounters that threaten to alter the course of the investigation.

One Swallow Does Not a Summer Make!

Episode 05

One Swallow Does Not a Summer Make!

Feb 4, 2026 · 22 min

Lynn and Arne assemble the servants to review the clues and sniff out the killers through deductive reasoning.

Time Will Tell

Episode 06

Time Will Tell

Feb 11, 2026 · 22 min

A distraught mermaid arrives at the detective agency searching for the reason why her lover tried to kill her.

Eating Whets the Appetite

Episode 07

Eating Whets the Appetite

Feb 18, 2026 · 22 min

Arne tracks down a jewel thief while Lynn investigates a series of disappearances connected to an art museum.

Desire and Love Make All Burdens Lighter

Episode 08

Desire and Love Make All Burdens Lighter

Feb 25, 2026 · 22 min

Lynn and Arne trace the mysteries of the missing men and lost piece of jewelry to their shocking conclusions.

Not All That Glitters Is Gold

Episode 09

Not All That Glitters Is Gold

Mar 4, 2026 · 22 min

Arne and Lynn are asked to investigate a man who appears to have started cheating on his wife after an injury.

Different Countries, Different Customs

Episode 10

Different Countries, Different Customs

Mar 11, 2026 · 22 min

Arne decides to investigate a locked-room murder on a whim and soon realizes that it may not be what it seems.

Birds of a Feather Flock Together

Episode 11

Birds of a Feather Flock Together

Mar 18, 2026 · 22 min

Arne uncovers a disturbing connection between all five of the cases investigated by the Arne Detective Agency.

All's Well That Ends Well

Episode 12

All's Well That Ends Well

Mar 25, 2026 · 22 min

Lynn and friends battle their way through Dracula's soldiers as they race to rescue Arne before it's too late.

About the series

The Case Book of Arne poster
Audience score
★ 6.5 /10

based on 8 votes

Synopsis

Louis Hartmann loses his father, a private detective investigating a string of murders, leaving him all alone. Rumor has it that the murders are the work of a Grave-Digger Vampire. Louis isn’t keen on superstitions and vows to catch the culprit himself. That is, until a self-proclaimed detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, appear. A new door is about to open for Louis…

AnimationMystery

Cast

7 principal cast

Mariya Ise

Mariya Ise

Louis Hartmann (voice)

Koki Uchiyama

Koki Uchiyama

Arne Neuntöte (voice)

Aimi Tanaka

Aimi Tanaka

Young Arne Neuntöte (voice)

Yuka Nukui

Yuka Nukui

Lynn Reinweiß (voice)

Yuki Sakakihara

Yuki Sakakihara

Zisye (voice)

Yuuki Shin

Yuuki Shin

Nachzehrer (voice)

Yoko Hikasa

Yoko Hikasa

Amy (voice)

Where to watch The Case Book of Arne

The Case Book of Arne is available to stream on Flicksy via 6 verified sources, aggregated from publicly available embed providers. The animation has 1 season and 12 total episodes, rated 6.5/10 by 8 viewers.

Frequently asked

How many seasons does The Case Book of Arne have?

The Case Book of Arne has 1 season with 12 episodes in total.

Is The Case Book of Arne still on the air?

The Case Book of Arne has ended and is no longer in production.

What network airs The Case Book of Arne?

The Case Book of Arne airs on Nippon TV.

When did The Case Book of Arne first air?

The Case Book of Arne first aired on January 7, 2026.

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