Detective Conan

10 Best Episodes of Detective Conan - Season 21

The cases of a detective whose physical age was chemically reversed to that of a prepubescent boy and he must hide his true mental development.

Written by Sophie and last updated on feb 08, 2023.

PS: The following content contains spoilers!

PPS: I will admit that parts of this page was written with the help of AI - it makes my work so much easier to not start from a blank page!

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Detective Conan - S21E1

#15 - Deduction Showdown at the Haunted Hotel (Part 1) (Season 21 - Episode 1)

Ran, Sonoko, and Conan are on the bus ride to Haido Hotel. Sonoko felt like that someone touched her butt. She caught the guy in the blue hat and accuses him that he's the pervert. The guy in the blue hat tells Sonoko that he's not a pervert but Sonoko thinks he's lying. So she told Ran to beat him up. Ran does as she says so she kicks but the guy in the blue hat blocks Ran's kick with his leg. He punches and Ran dodges. He kicks and Ran dodges again. Ran realizes that her opponent is using Jeet Kune Do. The guy in the blue hat is trying to explain that he's not a pervert but Conan explain for him instead. Conan saw that the real pervert was about to touch Sonoko's butt and the guy in the blue hat stopped the pervert. Sonoko got really mad at the real pervert. When the bus stops, the pervert got out quickly and runs away. Ran apologizes to the guy in the blue hat and he says it's okay. He asks where Ran is going and she told him that she and her friends are going to the Haido Hotel. The guy in the blue hat is going there too. He also thank Conan for explaining his innocence that he's not a pervert. When they arrived at the hotel, the guy in the blue hat is making a reservation but it seems he's having problems. Conan wants to eat cake so Ran, Sonoko, and Conan are going to look for a place to eat cake at the second floor of the hotel. When they're about to take the elevator, the woman named Toshiko Hirukawa came out of the elevator. She asks Conan where he's going and Conan told Hirukawa that he's going to cake buffet at the second floor. Hirukawa told Conan that he can't use the elevator because she says it goes to the annex. Conan thought the annex was under the renovation. Ran apologizes to Hirukawa and she says it's okay. She suggest that they should help each other when in need. Hirukawa's friends found Hirukawa and she apologizes them for keeping them waiting. While Ran, Sonoko, and Conan left, the man mentions how the person is doing. Hirukawa explain that t

The episode was rated 7.94 from 16 votes.

Detective Conan - S21E2

#14 - Deduction Showdown at the Haunted Hotel (Part 2) (Season 21 - Episode 2)

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After investigating the room, Sera declares the culprit.

The episode was rated 7.94 from 17 votes.

Detective Conan - S21E11

#13 - The Professor's Video Site (Part 1) (Season 21 - Episode 11)

Professor Agasa has recently posted a video on a popular website, asking for someone to evaluate an old vase he found in his attic.

The episode was rated 7.95 from 19 votes.

Detective Conan - S21E9

#12 - The Design of Poison and Illusion (Poison) (Season 21 - Episode 9)

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Conan and Heiji resume their investigation while Ran and Kazuha gossip about Shinichi's confession towards Ran.

The episode was rated 8.00 from 16 votes.

Detective Conan - S21E15

#11 - Co-Investigating with a First Love (Part 2) (Season 21 - Episode 15)

Chiba is unable to recall Naeko's face though notes his familiarity. During the investigation, Conan realizes the culprit's motif and has the police let the suspects leave.

The episode was rated 8.06 from 16 votes.

Detective Conan - S21E10

#10 - The Design of Poison and Mirage (Illusion) (Season 21 - Episode 10)

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Conan and Heiji's investigation leads them to realize how Ikuro and Serika were murdered.

The episode was rated 8.07 from 15 votes.

Detective Conan - S21E27

#9 - Detectives' Nocturne (Kidnapping) (Season 21 - Episode 27)

Arriving at Katshitsuka's home, Ran receives a phone call from Masumi. The phone call receives noise which Tooru deduces to indicate the house is bugged.

The episode was rated 8.12 from 17 votes.

Detective Conan - S21E8

#8 - The Design of Poison and Illusion (S) (Season 21 - Episode 8)

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The police arrive and their investigations reveal the baumkuchen was cut evenly into eight pieces and that only one of the piece was poisoned.

The episode was rated 8.13 from 15 votes.

Detective Conan - S21E5

#7 - The Case of the Besieged Detective Agency (Release) (Season 21 - Episode 5)

Conan declares Mitsui is innocent since she was witnessed leaving Miku's room; Sawaguri inferred the culprit crossed over from the balcony and left by his room. As for Miku's death, Conan explains she was mimicking the suicide of the main character in her book. Sawaguri becomes distraught as a result and is taken in by the authorities.

The episode was rated 8.25 from 16 votes.

Detective Conan - S21E3

#6 - The Case of the Besieged Detective Agency (Outbreak) (Season 21 - Episode 3)

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Isao Sawaguri came to the Mouri Detective Agency and brought together three female novelists he believe are responsible for his younger sister Miku's death the previous month. Isao threatens to blow up the Agency unless Kogoro reveals to him the truth about his sister's death and reveals her murderer

The episode was rated 8.35 from 17 votes.

Detective Conan - S21E29

#5 - Detectives' Nocturne (Bourbon) (Season 21 - Episode 29)

After visiting the three, Conan explains the robber in the video was left-handed and only Takayo Tegawa fit that description.

The episode was rated 8.39 from 18 votes.

Detective Conan - S21E23

#4 - Wedding Eve (Part 2) (Season 21 - Episode 23)

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A second DNA test with sterile samples reconfirms the rough DNA match leading Conan to a conclusion. Conan tranquilizes Kogoro and reveals Banba and Kamon are opposite sex identical twins. The secret phone calls were to a medical consultant with the final phone call confirming the genetic match. Learning of his, Kamon clasped her face into her hands, scratching some skin off, and committed suicide. In the aftermath, Amuro pays Kogoro to have him as his apprentice

The episode was rated 8.40 from 20 votes.

Detective Conan - S21E4

#3 - The Case of the Besieged Detective Agency (Sniping) (Season 21 - Episode 4)

Sawaguri, pleased to have another detective to find the culprit, obeys his requests to take pictures of the hostage's books which were autographed by Miku. During the course of the investigation, the authorities lose the chance to snipe Sawaguri after Ran closes the curtain as she believes Shinichi can find a solution to prevent any deaths. Miku's blog post reveals her last three visitors were from an elephant, a fox, and a rat. Conan explains the animals were based on the hostage's professions: The elephant is Sumika Nihei, due to her husband's seal designs is similar to an elephant's tusk; Shinobu Yuchi is the fox since she is a bakery and her food is colored like a fox's coat; and the rat is Tamami Mitsui whom is a stonemasonry which is gray like a rat's coat. In response, Sawaguri prepares to kill Mitsui.

The episode was rated 8.44 from 16 votes.

Detective Conan - S21E28

#2 - Detectives' Nocturne (Deduction) (Season 21 - Episode 28)

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Conan stops feigning his sleep and tells his kidnapper who is really she !!

The episode was rated 8.50 from 14 votes.

Detective Conan - S21E6

#1 - Conan vs. Heiji, The Deduction Showdown Between the Detective of the East and West (Season 21 - Episode 6)

Heiji and Kazuha visit Tokyo where the two part ways. A murder occurs at the restaurant Kazuha is in, forcing Kogoro, Ran, Sera, Heiji, and Conan to investigate.

The episode was rated 8.60 from 15 votes.

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