

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…
Animation, Mystery • Series • 2026 • 1 season
Starring: Mariya Ise, Koki Uchiyama, Aimi Tanaka

S1 E1 - 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.
Jan 7, 2026 • 23m

S1 E2 - 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.
Jan 14, 2026 • 22m

S1 E3 - Misfortune Never Visits Alone
Arne makes a shocking discovery about Lynn's father and Gordon reveals the dark truth of the Reinweiß mansion.
Jan 21, 2026 • 23m

S1 E4 - Those Who Never Gamble Never Win
Lynn and Arne are both troubled by surprise encounters that threaten to alter the course of the investigation.
Jan 28, 2026 • 22m

S1 E5 - 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.
Feb 4, 2026 • 22m

S1 E6 - Time Will Tell
A distraught mermaid arrives at the detective agency searching for the reason why her lover tried to kill her.
Feb 11, 2026 • 22m

S1 E7 - Eating Whets the Appetite
Arne tracks down a jewel thief while Lynn investigates a series of disappearances connected to an art museum.
Feb 18, 2026 • 22m

S1 E8 - 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.
Feb 25, 2026 • 22m

S1 E9 - 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.
Mar 4, 2026 • 22m

S1 E10 - 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.
Mar 11, 2026 • 22m

S1 E11 - Birds of a Feather Flock Together
Arne uncovers a disturbing connection between all five of the cases investigated by the Arne Detective Agency.
Mar 18, 2026 • 22m

S1 E12 - All's Well That Ends Well
Lynn and friends battle their way through Dracula's soldiers as they race to rescue Arne before it's too late.
Mar 25, 2026 • 22m
The Case Book of Arne
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…
Animation, Mystery • TV Series • 2026
