Other mistake: When Lois is saying about not having a spark in their marriage any more, the headboard of the bed keeps changing shades from light to dark in very quick succession. (00:03:00)
Other mistake: When Stewie and Brian are riding on the train, Stewie tells Brian, "It's nice that the locals act as their own train crossings." They are seated on the left side of the train and looking out their window at this time. As the train passes, we can see the only person standing there is on the right side of the train. Neither Stewie or Brian could have seen him from the direction they were looking. (00:14:10)
Other mistake: When the family is driving to New York, another red car passes in front of them from the right where there is no road. (00:09:35)
Suggested correction: Usually this would be right, but it's evident by their positioning that Peter is actually driving his car right in the middle of the road on the dotted line and not staying in one lane. This is why the truck passes on the left to get in front and then the car on the right, both also getting centered on the dotted line.
And Then There Were Fewer - S9-E1
Other mistake: As Joe is driving up to the house, just before coming to a complete stop, you can see that his window is completely closed. After stopping, Peter says "Joe?" Joe says "Peter?" Joe's window is now fully open. Trouble is, Joe seems to be completely surprised by Peter standing there which implies he never saw Peter even after stopping. His window has mysteriously opened immediately. (00:04:05)
Lois Comes Out of Her Shell - S11-E6
Other mistake: When Lois goes to Justin Bieber's dressing room, when she enters the room and Justin looks at her reflection in the mirror you can see her arm disconnect from her body as she talks to him. (00:17:15)
Other mistake: Peter is in the hospital and Lois is there talking to him. There are 2 IV bags and a heart monitor next to his bed. The monitor shows his heart beating normally yet there aren't any wires hooked up to him.
Other mistake: One of the ping pong balls that fell off Peter goes through the floor when it hits the ground. (00:00:50)
Other mistake: When Stewie and Brian are in Stewie's bedroom in the future, Stewie's time machine is nowhere to be seen. (00:15:00)
Other mistake: Joe salutes Quagmire's Dad. His legs are paralyzed, yet he uses them to push himself backward in his wheelchair.
Screams of Silence: The Story of Brenda Q - S10-E3
Other mistake: This episode is the only one in the entire series where there's a peephole in the door.
Stewie Goes for a Drive - S10-E4
Other mistake: Stewie is standing up on the driver's seat yet he can drive a car normally. His feet don't touch the pedals so how is the car moving?
Other mistake: It makes no sense that Brian ever drives a car. His feet don't even touch the pedals! Hes always sitting like a normal person does when they drive.
Other mistake: When Stewie asks if the sheep is being "baashful", the animation of the duck nearest the camera keeps repeating. Watch carefully and you will see 2 bits of grain moving backwards and forwards in a horizontal motion. (00:00:35)
Mr. Griffin Goes to Washington - S3-E3
Other mistake: In the cutaway to Mike Tyson during the baseball game, people in the crowd are missing their faces. (00:03:00)
Other mistake: When Peter tells Brian that "James Woods is being taken care of by top men" they show a philips head screw being hammered into the wooden crate in the warehouse. (00:20:15)
Other mistake: When Peter was rescuing the Fishmans he totally missed grabbing the woman's hand but she didn't fall. (00:19:50)
Other mistake: Lois goes to the bathroom at the bowling alley. There's only one way to the bathroom yet Quagmire beats her there and has time to hide in the stall. There's no way he could've done that considering he went after Lois.
The Thin White Line (1) - S3-E1
Other mistake: During the scene at the rehab clinic when Brian is jogging, Peter asks if he wants to go "mess with the pregnant teens across the lake." Brian says no because "Group therapy, two o'clock." However, the sky looks as if the sun is about to rise or just set. The time cannot be anywhere close to 2:00, neither AM nor PM.
Other mistake: Throughout many episodes, it's discovered that anybody that touches Death immediately dies. When Stewie learns that Death has come for Peter, he immediately touches his finger to lead him inside but manages to live.
Other mistake: When the cut scene goes to Star Trek The Next Generation, all of the rank pips on the crew's collars can be seen on their left side. All Starfleet rank insignia, with the exception of Admirals in this series, is situated on the right side. (00:18:45)