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The Worst Episodes of The Case Book of Arne

Every episode of The Case Book of Arne ranked from worst to best. Explore the Worst Episodes of The Case Book of Arne!

Binge this in 4h 26m•Peaking at 7.0/10

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

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Nippon TV
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Episode Rankings

  1. #1 Worst Episode
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    The Case Book of Arne Season 1 Episode 7 - Eating Whets the Appetite
    3.5/10(2 votes)

    #1 - Eating Whets the Appetite

    S1:E7

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

    Director:Unknown
    Writer:Unknown

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  2. The Case Book of Arne Season 1 Episode 5 - One Swallow Does Not a Summer Make!
    4.0/10(2 votes)

    #2 - One Swallow Does Not a Summer Make!

    S1:E5

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

    Director:Unknown
    Writer:Unknown

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  3. The Case Book of Arne Season 1 Episode 6 - Time Will Tell
    4.0/10(2 votes)

    #3 - Time Will Tell

    S1:E6

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

    Director:Unknown
    Writer:Unknown

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  4. The Case Book of Arne Season 1 Episode 4 - Those Who Never Gamble Never Win
    5.0/10(2 votes)

    #4 - Those Who Never Gamble Never Win

    S1:E4

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

    Director:Unknown
    Writer:Unknown

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  5. The Case Book of Arne Season 1 Episode 8 - Desire and Love Make All Burdens Lighter
    5.0/10(1 votes)

    #5 - Desire and Love Make All Burdens Lighter

    S1:E8

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

    Director:Unknown
    Writer:Unknown

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  6. The Case Book of Arne Season 1 Episode 10 - Different Countries, Different Customs
    5.0/10(1 votes)

    #6 - Different Countries, Different Customs

    S1:E10

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

    Director:Unknown
    Writer:Unknown

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  7. The Case Book of Arne Season 1 Episode 2 - There Is Always Sunshine After the Rain
    6.0/10(1 votes)

    #7 - There Is Always Sunshine After the Rain

    S1:E2

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

    Director:Junya Koshiba
    Writer:Hitomi Ogawa

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  8. The Case Book of Arne Season 1 Episode 9 - Not All That Glitters Is Gold
    6.0/10(1 votes)

    #8 - Not All That Glitters Is Gold

    S1:E9

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

    Director:Unknown
    Writer:Unknown

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  9. The Case Book of Arne Season 1 Episode 11 - Birds of a Feather Flock Together
    6.0/10(1 votes)

    #9 - Birds of a Feather Flock Together

    S1:E11

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

    Director:Unknown
    Writer:Unknown

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  10. The Case Book of Arne Season 1 Episode 12 - All's Well That Ends Well
    6.0/10(1 votes)

    #10 - All's Well That Ends Well

    S1:E12

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

    Director:Unknown
    Writer:Unknown

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  11. The Case Book of Arne Season 1 Episode 3 - Misfortune Never Visits Alone
    6.5/10(2 votes)

    #11 - Misfortune Never Visits Alone

    S1:E3

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

    Director:Unknown
    Writer:Unknown

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  12. The Case Book of Arne Season 1 Episode 1 - Those Who Dig Pits for Others Will Fall In Themselves
    7.0/10(2 votes)

    #12 - Those Who Dig Pits for Others Will Fall In Themselves

    S1:E1

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

    Director:Keisuke Inoue
    Writer:Aya Matsui

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Worst Episodes Summary

"Eating Whets the Appetite" is the worst rated episode of "The Case Book of Arne". It scored 3.5/10 based on 2 votes. Directed by Unknown and written by Unknown, it aired on 2/18/2026. This episode scored 0.5 points lower than the second lowest rated, "One Swallow Does Not a Summer Make!".