Tantei Gakuen Q

EP1 - Awaken! The Best Detective in the World!!

Kyuu, a mystery otaku, bumps into an old man at the market place, who mistakes him for stealing his money. Megu uses her photographic memory to get out of trouble and Kyu figures out where the missing money is. As a form of gratitude, the old man treats them and tells them that he is in a hurry as he needs to go to Hokkaido, where his daughter is getting married. Later, Kyu and Megu see a man on the rook of a building being constructed, waving a torch, and jumping. As they run there, Kinta joins them and they see the dead man is the old man they met before. Even as the police are about to conclude this as a suicide, Kyu tells them it can't be, since the old man wanted to go to Hokkaido. He starts searching for the only clue left behind by the culprit in the grounds, and is even joined by Kinta and Megu who help him out. After he solves the case almost single handedly, Kinta and Megu tell him about the Dan's Detective School/DDS and Katagiri hands them the guide to the enrollment program.

EP2 - A First Step to Dreams - The Entrance Exam Trap

Kyuu, Megu, and Kinta enter the Entrance exam to DDS. A photograph is shown before it is declared that the test is to deduce and follow the culprit of a murder case, where the only clue is the photograph shown moments ago, which was taken by the victim. As Kyu, Megu and Kinta use their skills to deduce the culprit, and follow him to the second exam location, they are joined by Kazuma. Another hopeful, Saburōmaru, who knew Megu from Tokyo National Talent Development Research Center, follows them, thinking it is easier than deducing himself.

EP3 - Final Exam! The Stretched-Around Trap

A few obstructions are met during the exam, which the group solves using the wits of Kauzuma. However due to the interference of Saburōmaru, the group is split up when a bridge breaks beneath them, with Kinta and Kazuma proceeding to the exam hall, and Kyu and Megu being swept away quite a distance by the river. As Kyu and Megu retrace their steps, they are halted by a cry of help, from a man who has fallen down the cliff and has broken his leg. Kyu deduces this to be a trap to stall examinees and they leave the man. But later, he hears a siren, signaling the release of water from the dam. Kyu returns to help the man, who in turn, encourages him to not give up until the end. Kyu enters the exam hall with 10 minutes to spare and declares that he wants to take the exam. In the end, Kyu is able to solve only one question. Even so, he is admitted to DDS, since Dan tells that the question was one of the most difficult cases encountered by himself, and only one more person has been able to solve it so far.

EP4 - An Intent to Kill at the School Entrance Ceremony! School Bomb Threat

Kyu, Megu, Kazuma and Kinta find themselves allocated to Q Class. Bent on revenge for failing the entrance exam, someone is threatening the school with bombs. They are caught, but a bomb detonates right where they are threatening Dan with another bomb, which is set to blow in another 10 minutes. Kyu and the gang decide to protect their dear school and Kyu deduces the location of the third bomb. Kyu and the rest are introduced to the building where their classes will be taken - it is the old building where Dan started his work as a detective.

EP5 - Crack the Code!? A Message from the Deceased

Kazuma is frustrated for being in Q Class, considering himself to be a better student. He requests Dan to join a case allotted to A Class, and Dan grants his wish, asking the whole of Q Class to join. The scene is of a murder, of Ootori, who has been murdered due to a pot thrown on his head from the floor above in his house. The only clue is a series of jumbled letters left on the victim's computer monitor. Kazuma uses a decoding software written by himself, but fails to decode the dying message. The group leaves for the day, without able to find any more clues. Finally, Kazuma, taking Kyu's advice, is able to solve the message and goes to the culprit. Unfortunately, the culprit tries to kill him, to hide the evidence, when he is finally rescued by the timely arrival of Kinta, Kyu and Megu. Kazuma finally realizes that he is in the right class.

EP6 - The Perfect 1000-Witness Alibi

Kyu, Megu and Kinta are involved in a murder that takes place in a house. The victim has an actress sister and a maid at the household. Since the actress has about 1000 witnesses who watched her performance when the murder took place, the obvious suspect is the maid. But Kinta has a solid instinct which tells him that it is the actress who is the murderer. They take Kazuma's help and the group is able to solve the mystery behind the murder.

EP7 - The Jigsaw-Puzzle Will

The group visits a friend of Katagiri, who is a splendid artist. It turns out that he too has the same ability as Megu, of photographic memory. Unfortunately, he is killed and the dying message is a 5000 piece solid white puzzle that only Megu can solve thanks to her photographic memory.

EP8 - The Pretty-Boy Detective! He Appears at Last!!

Q and A classes go to a field trip to Kirisaki Island along with Dan, Katagiri and Maki. They are also joined by a mysterious handsome boy. Once there, they begin classes - Dan tells them that they are there to solve the mystery of murders from about 50 years ago that happened in the island. The group finds that one of the three portraits in the main room, has been torn to half using one of the missing kitchen knives. Maki also tells them that the key to the rooftop store room is missing and he gets a duplicate. Later on, Dan describes the details of the murder and leads them to the room in the rooftop. As he describes the scene of a double-locked-room mystery, the group finds that Saburōmaru has been murdered, leaving only the left half of his body behind - is the island going to be haunted by another string of murders committed by a Jack the Ripper wannabe?

EP9 - Showdown! The Cutthroat Who Crossed Through Time!!

Kyu discovers the key to the store room inside the room, making it a double-locked-room mystery. The classes are trapped there by a storm. Dan asks the students to help out with resolving the mystery. They find that the kitchen has been ransacked, and Kazuma finds something to form a theory to solve the double-locked-room mystery. Unfortunately this theory fails, but not before giving a clue to Ryu. Later that night, Kyu hears a knock on his door, and is joined by Kinta as they follow a trail of muddy shoe prints leading to a room where Shishido lays murders, his body also split into parts.

EP10 - The Beautiful Boy Genius - Exposing the Perfect Mystery Room

Two students are dead. All the victims have been Class A members. Megu questions the existence of another person in the island, since the only things taken from the kitchen were butter and flour - certainly nothing enough to feed a person and Dan concludes that the murderer is among them. Even as Kyu is remains bothered by the shoe prints, Ryu solves the mystery of the double locked door room. Kyu gets re-affirmation from Ryu that the shoe prints are suspicious as they are too clean. They are approached by Shiramine, who tells them that Gouda is missing and leads them to Dan. They all go outside, and find an open window on the 5th floor, with a bloody arm, which is pulled back into the window even as they are watching. Leaving Megu and Yukihira behind along with Maki, they all run to the 5th floor, to find muddy shoe prints again leading to a room where Gouda lays murdered, his body cut apart into more pieces. The group gets depressed thinking they are only waiting for their own deaths, when Kyu bucks up, remembering why he wanted to be a detective. This makes the group reconfirm their resolve, as they get together with Ryu to solve the murders.

EP11 - The Final Deciding Match! The Truth about Q Class!!

Kyuu, Megu and Ryu team up and Kazuma and Kinta form another team. Each group finds their own clues and form their deductions. They then gather everybody around and methodically lay out the explanations to solve the case and find the murderer. Dan reveals the secret behind the new class - Q Class - that they are not failures, but are the candidates for the succession of Dan's position in the school.

EP12 - A Curse Breaks Out!? The Séance Murder Case

Kyuu's friend, Kaoru Ichinose, comes to seek help when a spirit medium mysteriously appears with a letter from her mother who died in a plane crash. The spirit medium had apparently successfully summoned the spirit of her deceased mother, but she is still skeptical and has Kyuu and his friends participate in the next seance. When they do, the spirit medium Asakura is murdered in the dark.

EP13 - Evil Spirit in the Locked Room! The Unstoppable Murders

The spirit medium's Murder is much more complicated than anyone first thought especially when a second murder takes place and Kaoru is accused by a police detective of being the culprit. Luckily Ryuu proves her innocence, although he declares that it will be difficult to solve this case. When Kyuu suddenly declares that he has solved the case and has identified the culprit.

EP14 - An Announcement From the Spiritual World! The Forbidden Truth!!

Kyuu begins his deduction and immediately points out Kaoru’s brothers as the culprits. As they had worked together to Murder the spirit medium Asakura and their aunt because she had the misfortune of discovering the murderer’s true identity and attempted to blackmail them. When the brothers refuse to confess to their crimes, Kyuu is forced to reveal the bitter and shocking truth: the spirit medium Asakura was in fact their mother. They don’t believe this at first, but their mother’s secretary confirms that it is all true. Leaving them shocked, they try to kill themselves but are stopped and arrested. Later, Kyuu finds Kaoru’s mother’s will and she states that she show this to her brothers and reconcile with them.

EP15 - 30 Meters Underwater. The Case of the Underwater Locked Room Murder

Class Q is on Vacation and a person is found missing, so Class Q decides to help them find the missing person.

EP16 - Class Rivalry! Battle of the Vanishing Person

Class A promises to defeat Class Q in the upcoming exams and replace the members of class Q and so Dan-sensei tells them to have the test at that moment. They are given the diorama of the murder and are supposed to solve it.

EP17 - Uncharted Waters that Lead to Death! The Legend of Spirited Away Village

Class Q is sent to solve the mysterious murder of the student and other murders that have taken place in Kamikakushi Village.

EP18 - The Conclusive Moment! The Corpse that Disappears into the Sky

A murder has taken place and they believe that the gods of their village are responsible.

EP19 - The Revelation of Death! You're Next!!

The secret behind one of the murders is understood, but then another is killed.

EP20 - It Comes to Light! The Masked High Priest - Crimes and Lies!!

Kyuu eventually deduces the murderer's identity and uncover the dark past of the village.

EP21 - The Last Mysterious Disappearance! There's Only One Answer

The murders of Kamikakushi village are solved. However, the murderer isn't going to give up easily as the former has one more trick in case of emergency...

EP22 - Dinner of the Dead

Class Q are on a trip until they encounter another murder case. A famous chef has been found dead sitting at the table ladened with a full course meal. With four people who all found the body at the same time as suspects, will the Q class be able to solve the mystery.

EP23 - Train Alibi

Kyuu and Kinta are on their way to a fishing trip. Traveling in a train, they meet a famous story writer but they're unaware that she's just in a murder attempt of her ex-boyfriend.

EP24 - The Cursed Idol

Kyuu gets interested in one of the cases sent to DDS, about a mysterious death of an idol, and uses his vacation time to investigate. Once there, he unexpectedly stumble upon Sakurako Yukihira of the A-class, who challenges him to deductive duel in this case.

EP25 - An Old Enemy! Pluto

Yukihara is kidnapped by an unknown assailant forcing Kyuu to find her. With the appearance of the rest of Class Q, they save Yukihara and help to solve the case of the idol's curse. In the end, there are hints of a sinister organization that begins to surface from the shadows...

EP26 - Megumi is Being Targeted

Megu, prompted by her sister, invites her classmates to her house for dinner though she actually wants to see her 'two princes.' However, it seems like someone has broken into her house-- but is it more than a simple break-in?

EP27 - The Lost Dragon

A new teacher, Tatsumi Hongōu, is assigned to teach class Q. While cleaning their building in place of Kinta, Megu and Kyuu discover a hidden door, and go exploring.

EP28 - SOS From The Underground Prison

Kinta, Ryuu and Kazuma realize that Megu and Kyuu have gone missing, and start a desperate search in DDS for them.

EP29 - Collector of Killers

Meg and Ryu are sent to an elite school to find out about the mysterious disappearances and also about the one who calls himself the Collector , who puts videos of the murders of students on the net.

EP30 - Broadcast of the Campus of Death

Meg is kidnapped, a student is killed, and the recording of the video is on the net.

EP31 - Tragic on the Net

The mystery is solved and the secrets are understood.

EP32 - The Beauties Detective Squad

Megu, Yukihara, and the newcomer Kuniko Touya are sent to help Kyuu and Kinta after they're mistaken as peepers during on their case, but the three girls stumble upon another case.

EP33 - Mystery of the Home Economics Classroom

Kazuma's elementary school is missing a 'cursed' blow dart and a sample of curare. A teacher is shot by a blowdart from a sealed room.

EP34 - The Curse that Disappeared

With everyone's help, Kazuma discovers the perpetrator's identity and decides to confront the latter...

EP35 - Bomb of the Terrifying Gem

A madman has been planting bombs in three buildings. He claims that he can talk to the God of gems. DDS set out their move and manages to find the man, but he has already planted the fourth bomb. Kyuu and his friends figure out where the bomb was planted, but they were unable to find it. With only 5 minutes remaining until the bomb explodes, will Class Q find the bomb in time before it explodes?

EP36 - The Murder Case of the Illusionary House

Class Q are sent to investigate the threat sent to a violin teacher. But as soon as they arrive, a murder takes place.

EP37 - Rhythm of the Death God

A second murder has Ryu looking like a suspect. Will the serial killer ever be found?

EP38 - Homicide Concert

The murderer has been revealed and the secrets come to the light. However, even after the truth has been said, there will be one more tragedy of the night...

EP39 - The Death March of Friendship

Kinta takes Ryu to the hospital after the failed murder attempt on Kyuu by a PLUTO agent.

EP40 - Duel! The Headless Woman

Ryu, Kyuu, and Kyuu's mother go to the third street where The Headless Woman wanders, can they find the truth or face their death...

EP41 - Murder Case of the Maya Princess

EP42 - Village of the Traitor

EP43 - Ryu's Determination

EP44 - Dan Morihiko, Kidnapped!

Dan-sensei visits his best friend and comrade, Satoru Renjo, Kyuu's father. On their way back guys with rifles came and get him. The culprits called a ransom on the appointed time or else the bomb will go out. Will the detectives be able to rescue Dan-sensei or give into the culprits' demands?

EP45 - The Future Detective

The battle of DDS and Pluto have finally come, will Ryu escape his destined fate and will Kyu find out his past? The final battle had come to an end. There's only ONE answer!!