Episode #1.7 - S1-E7
Stupidity: When Eugene approaches Tsuda after Tsuda is shot by Ae-sin, Tsuda attempts to shoot him, but after pulling the trigger, he realises there are no bullets in the gun. Seconds later, a group of soldiers run up to him, and he attempts to shoot them, but he can't because the gun is still not loaded. Something he should have known since he only just attempted to shoot Eugene and failed because of it. (00:50:00 - 00:50:30)
Episode #1.8 - S1-E8
Stupidity: There's a gunman that just opened the school doors, and he's looking at the police like "a deer caught in the headlights" and they are all pointing their weapons at him and he's holding a gun mind you, but somehow these cops let him run back into the school without even taking a singe shot at him. His background was clear too, so if the cops fired there would've been no collateral damage if they had a shoot out. (00:35:00 - 00:35:30)
Young Kidaichi's Murder: File 1 - S2-E1
Stupidity: Kindaichi behaves in a criminally illogical way in this fourth parter episode. The original victim told 4 separate people some sort of keyword for the party, each one linking to another person. Kindaichi after at least the second if not the first victim could and should have asked EVERYONE (he had every opportunity for that) if they received such a 'password' by Tachibana before he died. Instead, he pointlessly follows the trail of breadcrumbs and two if not three people die for nothing.
Stupidity: The emigrants lack guns yet after several bandit raids the team does not take the guns and ammo from the bandits to protect themselves from future raids. It's not like they can swing by the local Cabelas and stock up on guns and ammo.
Welcome to Hotel del Luna - S1-E1
Stupidity: The Mayor realises that Man-wol has approached him and taken out her rifle to shoot him with. Yet during the entire time she takes to aim the rifle at him and fire, the Mayor makes no attempt to flee the stage for his own protection. (00:38:15)
Two Hundred Dollars and a Bus Pass - S1-E8
Stupidity: Two police officers and a physician find an injured woman in a lab. The officers attend to the woman while the physician calls for EMTs. Wouldn't it be better if the physician looked after the injured person while the officers called for help?
Stupidity: The experienced cop Pullman enters the house of the well-known badass villain with her partner only, without any more backup. After the partner gets killed, Pullman stands free in the middle of the room without any cover - just 'begging' to get shot dead. (00:53:15)
Stupidity: S1E8 Obsessed - Morgan and the detectives respond to the beach for a possible homicide. None of the detectives or Morgan are wearing protective gloves. Throughout the series, the detectives remind Morgan to wear gloves before touching evidence. However, she takes the pulse of the victim without gloves. (00:04:02)
Stupidity: When the storage unit guy gives Reemie (lawyer) full access, she enters, then rolls the door down to shut him out before grabbing what she needs, and then acts all surprised and irritated when she discovers she's locked in, having to force her way out. The smart lawyer she’s supposed to be should have closed the door only a bit or shooed the storage guy away.
Stupidity: The series relies on the fantasy that wealthy people with home security systems don't also have security cameras... and that the alarm systems - as well as the cameras and motion sensors - wouldn't be sending emails and text alerts whenever the alarm is deactivated or motion is detected, which every security system in the last 20 years has done.