Other mistake: While Quagmire is tickling Meg on the couch, there's a brief moment when her mouth disappears. (00:12:28)
Other mistake: When Peter sits down with Mayor West to discuss terms, West says, "Thank you all for coming." As he does, he tilts his head down and the bottom half of his nose disappears until he moves his head again. (00:20:38)
Other mistake: When Peter is digging a hole in his back yard, he uses his shovel to cut the power supply to all of Quahog. We see Joe watching TV and Quagmire messing with his sex doll. The power cuts off, and so then Joe's TV turns off and Quagmire's doll turns off. However, the lights in the rooms they are in stay on. The power being cut would have turned off the lights also. (00:05:32)
The Birthday Bootlegger - S20-E8
Other mistake: Stella is deaf and lip-reads. When Preston announces he can allow office birthdays again, Stella immediately cheers at the exact same time as everyone else, but from the camera angle, Preston is standing in front of Stella and facing away from her.
I Never Met the Dead Man - S1-E2
Other mistake: When the freezing rainstorm first starts, it cuts back to Peter and William Shatner. In this shot, a woman in the background is running towards the right side of the screen, then disappears mid-shot without leaving the frame. (00:19:29)
Other mistake: After Stewie gets his toy back from the cupboard, Lois and Peter walk into the kitchen. Lois asks Peter, "Since when are you so concerned about our food budget?", and in the next shot of Peter, the buttons on his shirt are missing; then they reappear in his next close-up. (00:10:01)
Other mistake: After the scene of the family watching Philadelphia at the movie theatre, Peter promises Lois that not a drop of alcohol is going to touch his lips. In this shot, Peter's buttons are on the left side of his shirt instead of the right like they should be. (00:03:39)
There's Something About Paulie - S2-E16
Other mistake: After the car bomb destroys their new blue car, the groom at the wedding comes out to warn them too late, then runs off. As Peter and Lois are turning around in the next shot to walk, the cars behind them are disproportionally small, with the scaling being off here. (00:21:35)
There's Something About Paulie - S2-E16
Other mistake: Peter follows the mobster to the "pet store" and is standing on the sidewalk when the mobster gets out of his car and goes inside. The street here is comically disproportionately small. So much so that when Peter walks across it, he clears the entire road in two steps. (00:14:40)
There's Something About Paulie - S2-E16
Other mistake: Peter walks into the living room and finds Lois on the couch. Just after he asks her if she's been drinking, she starts to sit up and then suddenly the entire episode starts bobbing up and down. Like the show is on a camera bouncing in a car. This lasts a couple of seconds then stops. I checked on Disney+, Hulu, and WCO. Each of these had the same camera jitters in that moment. (00:00:45)
Other mistake: After the Kentucky cut away with Peter, we're back on the plane. He sits down and is surrounded by the exact same other characters from the last plane we saw him on: the pink lady sitting next to him and the man in the green suit sitting behind him. This is after at least a day or two in the episode, and Peter is flying all over the world on different planes as a freeloader with his wife's new job. It's next to impossible that he'd be sitting next to the same lady and in front of the same man again. (00:09:30 - 00:15:10)
Other mistake: This mistake appears to only be in the digital version of the episode on Hulu and Disney+. After Stewie fires the net gun at the other kid in the Duck Duck Goose game and says he's still it, we get our first real look at Janet as she giggles at Stewie. For a few frames as it zooms in on her, the top of her head is cut off and blinks out of existence. (00:05:55)
Other mistake: While Lois is kneeling at the entrance of the playground with Stewie, a woman is walking by carrying a baby. The playground gate entrance is casting a long shadow; however, Lois, Stewie, and the woman are not casting shadows in the same way. (00:03:35)
Tales of a Third Grade Nothing - S7-E6
Other mistake: In the cutaway at Ford's Theater, Abraham Lincoln receives a cell phone call from someone who is implied to be Thomas Jefferson. While the anachronism of a cell phone in the Civil War can be ignored as humorously deliberate, Lincoln can't be talking to Jefferson; by April of 1865, when Lincoln was assassinated, Jefferson had been dead for nearly 40 years.
Suggested correction: Where are you getting the implication that it is Thomas Jefferson? You seem to have misunderstood the joke. "I hear you took that black chick home. You're welcome." is not a reference to Jefferson sleeping with one of his slaves. It's simply a reference to Lincoln freeing the slaves. Tom is just a generic name. (Besides, if you're complaining about historical anachronisms in Family Guy cutaways, you're probably missing the point.)
I concede that it's a bit of an assumption, but can you really fault me for making it? Yes, Thomas and its derivations can be common given names, but off the top of my head, I can't think of any from Lincoln's era famous enough for casual viewers to automatically make that assumption.
Conversely, since the allegations about Jefferson and Sally Hemings have endured for 220 years, Occam's Razor suggests it's the first thing probably 99% of us would immediately think of upon hearing "Thomas" and "black chick." And I have no problem with the historical anachronism of Lincoln owning a cell phone. Believe me, I get the joke; his obnoxious behaviour is why Booth shot him, and cell phones are so ubiquitous, it's something we in the 21st century can relate to.
The issue I have is of a factual nature. Even for an animated sitcom, there are certain tenets of reality that I think must be adhered to if a joke is going to be set in a specific time period, two of which are the passage of time and the finality of death. For the sake of argument, humor me and assume that it is Jefferson; it is well-documented historical fact that Jefferson died on July 4, 1826, the 50-year anniversary of the Declaration of Independence's adoption.
The reason why it's so well-documented is because, in one of the biggest coincidences in American politics, John Adams, a political frenemy of Jefferson's, and under whom he served as vice president, also died that day. My argument is that, given the limited context of the scene, under an assumption that 99% of us would make, the Thomas calling Lincoln can't be who it's implied to be, because who it's implied to be had been dead for nearly four decades.
Except Thomas Jefferson wasn't from Lincoln's era. You say yourself he had died almost 40 years earlier. This error seems to boil down to, "I'm going to assume that it is a Thomas Jefferson reference. I'm also going to assume that everyone else will see it that way. And that the producers didn't realise Jefferson was dead at the time. Therefore, it is an error based on my unfounded assumptions."
And Then There Were Fewer - S9-E1
Other mistake: When they are chasing Tom around the dining table, they huddle up in a circle. Everyone is looking at Peter talk, and when Doctor Hartman says "Damn, that is awfully risky," if you look at Carl's eyes, they clip outside their eyes to look at Hartman.
Other mistake: Joe Swanson is colored incorrectly. His color scheme is apparently the same as Peter Griffin's when looking at his skin color and hair. It is fixed shortly afterwards. (00:11:54)
Other mistake: The guys lasso the bear. Then Peter impossibly lassos the bear's legs. There's no way for the lasso to go around the bear's leg with his feet on the ground. And the lasso couldn't have gone over the body down to the legs since the other ropes would have gotten in the way.
Other mistake: Peter says I can't afford to keep you. He puts 4 bullets in the shotgun. He shoots a total of 5 times.
Jungle Love - S4-E13
Other mistake: In the kitchen when Peter is playing with the paddle ball and then Brian confesses to giving Chris the idea about joining the Peace Corp, there is a picture frame on the wall behind Peter. In this is various pictures of the family including Brian. In this, Brian is as a yellow dog despite being white in the series, and even in the scene depicted.
Other mistake: After Brian says Chris is tweaked and Chris says maybe the toad is Meg's, the bubbles in the aquarium stop moving. (00:03:35)
