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Anime series

The Case Book of Arne

Latest episode

S1 E12 · All's Well That Ends Well

About The Case Book of Arne

The Case Book of Arne is a mystery anime series that premiered on Nippon TV on January 7, 2026. It has 1 season and 12 episodes so far and has ended. The latest episode, Season 1 Episode 12 "All's Well That Ends Well", aired on March 25, 2026.

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…

  • Mystery
  • Animation

Last updated

Episodes

12 episodes · 1 season

Season 1

2026 · 12 episodes · Last episode: 7 months ago

The Case Book of Arne Season 1 release dates →
  1. The Case Book of Arne S1 E12 still E12

    12. All's Well That Ends Well

    Finale

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

  2. The Case Book of Arne S1 E11 still E11

    11. Birds of a Feather Flock Together

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

  3. The Case Book of Arne S1 E10 still E10

    10. Different Countries, Different Customs

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

  4. The Case Book of Arne S1 E9 still E9

    9. Not All That Glitters Is Gold

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

  5. The Case Book of Arne S1 E8 still E8

    8. Desire and Love Make All Burdens Lighter

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

  6. The Case Book of Arne S1 E7 still E7

    7. Eating Whets the Appetite

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

  7. The Case Book of Arne S1 E6 still E6

    6. Time Will Tell

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

  8. The Case Book of Arne S1 E5 still E5

    5. One Swallow Does Not a Summer Make!

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

  9. The Case Book of Arne S1 E4 still E4

    4. Those Who Never Gamble Never Win

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

  10. The Case Book of Arne S1 E3 still E3

    3. Misfortune Never Visits Alone

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

  11. The Case Book of Arne S1 E2 still E2

    2. There Is Always Sunshine After the Rain

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

  12. The Case Book of Arne S1 E1 still E1

    1. Those Who Dig Pits for Others Will Fall In Themselves

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

The Case Book of Arne FAQ

Will there be new episodes of The Case Book of Arne?

The Case Book of Arne has ended, so no new episodes are scheduled. The final episode aired on March 25, 2026.

When did the latest episode of The Case Book of Arne come out?

The most recent episode of The Case Book of Arne, Season 1 Episode 12 "All's Well That Ends Well", aired on March 25, 2026.

How many seasons of The Case Book of Arne are there?

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

When did The Case Book of Arne first air?

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

How do I get notified when new episodes of The Case Book of Arne are released?

Download the Streambay app, follow The Case Book of Arne, and you'll get a push notification the moment each new episode is released.

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