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第 季第 4 集1 - The Lone Swordsman and the Famous Detective
2023年1月3日24 分鐘Security police officer Fukuzawa Yukichi arrives at work to discover that his client had been assassinated. The assassin is already apprehended by the time he arrives, but something doesn’t quite seem right.可供購買第 季第 4 集2 - The Day Is a Dream, The Night Is Real
2023年1月10日24 分鐘Fukuzawa gives Rampo a pair of glasses, claiming that wearing them would activate his ability to instantly determine the truth of any situation, and taking them off would give him the ability to tolerate the stupidity of the ordinary person.可供購買第 季第 4 集3 - The Secret Founding of the Detective Agency
2023年1月17日24 分鐘Rampo gets a ride to the police station, but the officer doesn’t seem to be who he says he is.可供購買第 季第 4 集4 - A Perfect Murder and Murderer, Pt. 1
2023年1月24日24 分鐘Kunikida is being held for a murder that Rampo is certain he didn't commit. Meanwhile, Poe is determined to solve a murder mystery that has had the poilce stumped. Rampo has some thoughts on that situation, too.可供購買第 季第 4 集5 - A Perfect Murder and Murderer, Pt. 2
2023年1月31日24 分鐘The last page of the manuscript received by Poe appears to have been a photocopy. Rampo seems to know why, but there are still more mysteries surrounding the death of the author.可供購買第 季第 4 集6 - Tragic Sunday
2023年2月7日24 分鐘The Detective Agency receives an urgent request from the government to investigate a series murders perpetrated by the same culprit.可供購買第 季第 4 集7 - Dogs Hunt Dogs
2023年2月14日24 分鐘The Detective Agency is framed for the brutal murder of several government officials. Its members are on the run from the Military Police.可供購買第 季第 4 集8 - You, A Child of Sin; I, A Child of Sin
2023年2月21日24 分鐘The president of the Detective Agency is arrested, and Kunikida is missing after having blown himself up with a grenade. Meanwhile, Atsushi and Kyouka are on the run, looking for a way to defeat the true mastermind: Fyodor.可供購買第 季第 4 集9 - Dream of Butterflies
2023年2月28日24 分鐘Port Mafia boss Mori wants Yosano to join them in exchange for assisting the Detective Agency through their crisis. Yosano reveals why she would rather not.可供購買第 季第 4 集10 - In Lament of My Wingless Body
2023年3月7日24 分鐘Tanizaki, Miyazawa and Yosano head to the site where Yosano is scheduled to be handed off to the Port Mafia.可供購買第 季第 4 集11 - Jailbreak
2023年3月14日24 分鐘Atsushi and Kyouka convince Mushitaro to escape the vault with them. While making their escape the bank is surrounded by the Special Operations Division being led by Sakaguchi Ango, a member of the Seventh Agency.可供購買第 季第 4 集12 - Bungo Hound Dogs
2023年3月21日24 分鐘Suspecting that Lucy is cooperating with the terrorist organization known as the Armed Detective Agency, Jouno and Tetchou pay a visit to the cafe at where she works, in hopes of tracking down Atsushi and Kyouka.可供購買第 季第 4 集13 - Skyfall
2023年3月28日24 分鐘Dazai instructs Atsushi to capture Sigma, who holds the key to stopping the Decay of the Angels' planned terrorist attack. Sigma, meanwhile, is hell-bent on protecting the Sky Casino.可供購買