Plot hole: The police are looking for school shooters who wore unicorn masks. There are cell phone recordings of the individuals shooting and I believe CCTV recordings from inside the school. There is a forensic science technique of accurately estimating suspect(s) height(s) using CCTV/camera recordings and math to determine the height. The police could have further narrowed down their pool of suspects by using this forensic method, but they are going at the students blindly chasing dumb leads.
Plot hole: "Red" is somehow serving a life term or what for the execution murders of some Russian spies, her husband and his cronies had headed up. But her hubby somehow escaped any such sentencing.
Plot hole: When Nadia had been held captive in The Village, how did she get word to her accomplice to be ready at the exact time, in the exact location, and with a packing crate ready, and a whole series of transports arranged? Even if Nadia was in on the ruse of conning Number 6, wouldn't he be suspicious?
Plot hole: Early in the show, Jamie is in a patrol car escorting a witness when they are attacked by several guys in a van. The side windows of their cruiser seem shatterproof and withstand many bullets, while the rear window is shattered immediately. NYPD cruisers do not have bulletproof windows.
Grass on the Streets and Weeds on the Rooftops - S4-E10
Plot hole: Beth surprises Jamie in the act of disposing of his father's body at the train station. But Beth doesn't learn about the train station until season 5, episode 8. So, how did she know where to catch Jamie in the act?
A Deadly Net - S2-E2
Plot hole: S2E2 A Deadly Net Midway through the episode, Sylvia and others in the cast bid people goodnight, offer after-dinner drinks, but the sun is shining brightly and continues to do so for quite a period of time as events continue to unfold.
Testing, Testing, 1...2...3...4 - S7-E20
Plot hole: Gwen Taylor tells her Bar prep instructor, Tony Henderson, that she does not have a law degree and that she has been apprenticing. This would indicate that she did not go to law school. But in 6-01, she tells Leland McKenzie that she was accepted to Loyola Law School and that she was thinking about going. Leland convinces her to go. In multiple episodes, it is made clear that Gwen is attending law school. Frank Kittredge helps Gwen understand the famous Palsgraf case, as well as the principle that came from it, "proximate cause." Additionally, Arnie tells Gwen that she will need to pick between her job and law school. Additionally, while sitting in on a staff meeting, Gwen asks if it's a bad time to discuss "res ipsa," which is a reference to the legal doctrine, "res ipsa loquitur," a torts principle that came from the case, Byrne v. Boadle (indicating that she was taking a law school torts class). There was no indication that Gwen left law school for an apprenticeship. (00:29:40)
The Book of Blood: Chapter Two: The Perdi - S2-E6
Plot hole: When announcing the 14 deaths, they make a generic statement to the friends and family of everyone in the pods, without first telling the affected families directly?! There's no way this would be dealt with like that - not least as they all then seem shocked that the parents start a riot/panic about whether their children are dead or not. Anyone with half a brain cell would have seen that coming a mile off. Not to mention that later on we discover one of the parents STILL hasn't been told if his daughter's alive or not. If this was a coverup or otherwise secret they wouldn't have said anything - there's no reason to announce the deaths but not clarify who died.
Plot hole: Although William Lewis burns his fingertips in an attempt to avoid identification, the Special Victims Unit could have identified him early on by examining the remaining unburned area of Lewis' hands, and in good police procedure still record the newly scarred fingerprints, as these new scars actually make his fingerprints more unique. His scarred fingerprints would still be at Alice's apartment crime scene, and during the trial at the end of the episode the prosecution would still have a strong argument for placing Lewis at Alice's apartment, even if the DNA evidence is thrown out because of alleged cross contamination.
Plot hole: They need at least 12 magnets to make it work, Paige collected 11. (00:21:00 - 00:22:00)
Plot hole: When Takashi is rescued by the other soldiers, he finds a piece of red fabric on him. He then has a flashback to the scene where that same piece of red fabric fell from Hong-pa's body whilst she was hanging beneath the tunnel and realises they are both the same piece. However, when this scene played out earlier, Takashi did not see this happen. He was on top of the bridge and was being held at gunpoint by Eugene, so he couldn't have seen the piece of fabric fall from her body. (00:46:10)
The Spores - S2-E7
Plot hole: Hal and Roy could not open the spore case with an electric power drill, but later a married couple pops it open with a hammer and chisel, then much later some children acquire the case and easily open it.
Plot hole: WARNING SPOILER AHEAD. The alien impersonating Skokes changed the ship's destination to Earth. This is impossible to have been done, as the first order the captain gave was to lock the course in and "Skokes" admits his security clearance was removed after his rescue from his prison. It also couldn't have been done by another alien spy, as no other survivors beyond the 4 (2 human and 2 aliens) were found and the only other alien spy was unconscious, so he couldn't have helped out in any way.
Episode #5.2 - S5-E2
Plot hole: Collision between the two planes would have been prevented by TCAS (traffic collision avoidance system) computer systems installed on both planes. The TCAS systems automatically coordinate with each other and issue a TA (Traffic Advisory) with an audible "TRAFFIC, TRAFFIC", then if on a course that could result in a collision or near miss, issue an RA (Resolution Advisory) to their respective flight crews. Typically one plane's flight crew is audibly ordered to "DESCEND, DESCEND" by its' TCAS and the other plane will be instructed to "CLIMB, CLIMB" by its' TCAS. The flight crew is required to follow their TCAS instructions over the air traffic controller's. All commercial airliners are required to have a functioning TCAS computer. These systems were obviously not under control of the terrorists, they were conveniently ignored in the plot. (00:03:20 - 00:06:47)
Plot hole: Someone as careful and controlling as Timo would never force anyone into working for him, for exactly this reason.
Plot hole: When Mike Walker is out looking for his son Connor calls Satch and asks, "What's up with Mike?". She couldn't know that there was anything up with him, she left before he heard his son was missing. Had she called Walker on his cell, he would have explained what was going on, as he was very eager to tell her. Obviously a set-up so that Satch could tell her that the boy was missing.
Plot hole: The way slipstream works is wildly inconsistent across the show. Sometimes, they have to travel a significant distance to find the nearest slip point, and other times, when it's required by the plot, there's a slip point conveniently right next to the ship.
Suggested correction: How is this a mistake? Unless the points are evenly distributed and all close to each other, they are going to be different distances away.