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The Case Book of Arne Season 1 poster

The Case Book of Arne Season 1 Episode release dates & where to watch

Premiered

Wednesday, January 7, 2026

Ended: Wednesday, March 25, 2026

When does The Case Book of Arne Season 1 come out?

The Case Book of Arne Season 1 premiered Wednesday, January 7, 2026 on Nippon TV and ended Wednesday, March 25, 2026. The season has 12 episodes.

Last updated

The Case Book of Arne Season 1 release schedule

The Case Book of Arne Season 1 episode release dates
Episode Release date

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.

Wednesday · 10 months ago

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.

Wednesday · 9 months ago

3. Misfortune Never Visits Alone

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

Wednesday · 9 months ago

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.

Wednesday · 9 months ago

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.

Wednesday · 9 months ago

6. Time Will Tell

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

Wednesday · 9 months ago

7. Eating Whets the Appetite

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

Wednesday · 8 months ago

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.

Wednesday · 8 months ago

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.

Wednesday · 8 months ago

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.

Wednesday · 8 months ago

11. Birds of a Feather Flock Together

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

Wednesday · 7 months ago

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.

Wednesday · 7 months ago

The Case Book of Arne Season 1 FAQ

When does The Case Book of Arne Season 1 come out?

The Case Book of Arne Season 1 premiered Wednesday, January 7, 2026 on Nippon TV.

How many episodes are in The Case Book of Arne Season 1?

The Case Book of Arne Season 1 has 12 episodes.

Are new episodes of The Case Book of Arne Season 1 released weekly?

New episodes are released weekly.

When is the The Case Book of Arne Season 1 finale?

The The Case Book of Arne Season 1 finale (Episode 12) aired Wednesday, March 25, 2026.

How do I get notified when new The Case Book of Arne Season 1 episodes are released?

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