Plot hole: In order for the show to be starting on "Day 1,412" as counted back from Cooper's eventual high school graduation, it would have to be a mere 49 days after his graduation from the eighth grade. (4*365 = 1460 + 1 for leap year) So it should be the middle of summer, but instead the school year seems to be in full swing. For example, it's already the end of Natalie's soccer season.
Plot hole: Tahnee was sent to boarding school when she got fired as a way to get her out of the show, but she was 17 and so isn't that a bit of a silly way to write her out? In Melbourne Australia, you can leave school if you wish at 15, so she in theory shouldn't be able to be forced into going to Boarding School.
Baby-Fier: Experiment 151 - S1-E35
Plot hole: When Nani, Jumba, Pleakley and Stitch are turned into babies, Pleakley says he did oops in his pants, but it is well known that Pleakly doesn't wear pants, so why does he say that when it's not true?
Saga of a Star World (1) - S1-E1
Plot hole: Apollo takes Adama down to the surface of Caprica aboard his Viper, yet the Viper is a single-seat fighter. This is the only time the single-seat craft is used to carry two people (though there is no shot of the two aboard - it is simply shown landed with the two characters nearby).
Suggested correction: It was 2 seater Viper training aircraft.
Plot hole: Laura successfully knocks out both bad guys, steals their van and crashes through the warehouse doors. The van doesn't stall, but inexplicably, she stops it, gets out and runs away on foot, even though the baddies are coming to and coming after her. Not the option you'd expect a kidnap victim to choose: most people would floor it and keep on driving. (00:23:40)
Plot hole: People are always told to not use their mobiles while in the hospital. However, the staff constantly use theirs.
Plot hole: "Sight Unseen": Wells has the key to Lori's shackles. Weston, who knows this, knocks Wells out, but instead of taking his keys, uses a completely unnecessary (and considerably more difficult) set of bolt cutters to break the leg cuffs. (00:32:30)
Plot hole: Earlier in the season, it was established that The Jem'Hadar are genetically engineered to be loyal to the Changelings, meaning they will not deliberately harm them. With that in mind, the Changelings still care about Odo's well being despite his refusal to return to them. So why didn't the Lovok Changeling send a message to The Jem'Hadar ships to inform them that a Changeling was going to be on the runabout? Given that he took time to offer another chance to return to his people, you would think he'd take time to make sure he returned to the station safely.
Suggested correction: Maybe The Jem'Hadar were trying to disable the runabout to try and capture Odo and Garak.
High Octane - S5-E7
Plot hole: When Dex is doing the jack in the box ,he is hanging out the sun roof driving with his feet, using the cruise control. When he is decapitated, the body falls and the car spins out and stops. The car's cruise control was still on. The car should have kept going until the brake was pressed. Even if the body hit the brake on the way down, it would have coasted to a stop and not spun out and screeched to a stop.
Orpheus in the Undergrowth - S2-E2
Plot hole: When Jeremy stopped to drink his water, which turned out to be vodka and which killed him via a heart attack, why did he hide himself away, surrounded by plants and only found by his mobile ringing? And why would he put the lid back on the bottle in the throes of a heart attack?
Plot hole: For the past 5 series, Bulk and Skull have been in every episode. They've seen villains from other galaxies (Lord Zedd, Rita Repulsa, The Machine Empire, and Divatox) who have all sent monsters to Angel Grove and threatened Bulk and Skull on countless occasions. They've even been turned into monkeys and made invisible by space creatures. Why do they feel the need to spend Series 6 seeing if alien life exists? Surely 5 series worth of aliens is enough proof?
Suggested correction: They do not spend the series seeing if alien life exists. Their first scene in the season is them spotting Astronema's ship through a telescope and yelling UFO. They know. It's another one of their kooky schemes to get rich by being the first to discover these aliens and getting rich off it. (they were out looking for an undiscovered comet) They even get Professor Phenomena who's already been doing this before they were. It always felt like a play on Peter Parker getting rich off selling photos of Spiderman. But, dumber. I mean come on they tried catching a rabbit with carrots because they thought it was an alien. Stupid idea yes. Plot hole. No. It tracks with their characters.
Suggested correction: Think about it They have no reason to believe that they are aliens from space. They look human or could have been created by humans. It could have been a form of magic. Plus we never know what the news or the government is telling the public to normalize these situations. They don't actually know where they came from.
This is only a theory. Theories never solve mistakes.
No one in Angel Grove, believes them when they say they've seen aliens. It's been a running gag since Zeo. Go back and look at King For a Day Part II, after they got back from being kidnapped. Even the professor is viewed as a kook for believing in the existence of aliens.
Robo Koopa - S1-E52
Plot hole: Near the end, Robo Koopa sets down Dr. Nerdnik after he had just captured and held him hostage. Why would he do that? (00:11:55)
Plot hole: In the bait and switch section, why does anyone involved agree to Leland being Ben's attorney when both victims are relatives of Leland? Neither Ben nor any of the police are in on Cooper's plan, and it seems implausible at best that they would agree to this.
Plot hole: Ham Tyler doesn't recognise Kyle Bates even though he met him in the internment camp in episode 3. Ham also makes exactly the same remark about Nathan Bates in both episodes. (00:10:30)
How I'm Spending My Summer Vacation - S2-E17
Plot hole: When Kevin is upset about Paul leaving for summer and is just lounging around the house, he asks why they can't go on vacation. His mom says "Maybe next Summer." In the very next episode, which takes place in the same Summer, they are going on a "traditional" Summer vacation.
Plot hole: When Linda (Mom) gets home from her cooking class and greets the boys, she sees nothing out of place. However, just a few moments before, we see the giant laser in the corner of the yard that they forgot to attach to the laser-inator. Wouldn't she have seen this?
Plot hole: Dorothy's son Michael is twenty-two years old in season three. When Sophia and Dorothy reminisce Brooklyn, NY, 1954, Dorothy asks Sophia to babysit her children, one of whom is Michael. Sophia refuses, so Dorothy says "I'll just leave them with Stan's mother." They talk about Michael screaming when Stan's mother was watching over them. If Michael was a baby in the fifties, he should be in his thirties in season three.
Plot hole: When Emily is dialing a number for Manny Martelli, to make arrangements for the funeral, she only dials two digits. She just got the number from someone else, so there's no way it was speed-dial.