Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: In the scene where Peter is at the baseball game, Stewie is sitting next to a boy he calls "Opie." The camera then cuts away to a clip. When the camera cuts back, "Opie" is gone and a grown man is now sitting next to Stewie. (00:02:55)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Mr. Weed is crying about losing his job, we see a view of a long line of trees in the window behind him. The camera switches to a close-up of Peter. When it zooms out again, the trees on the right of Mr. Weed are missing.
Suggested correction: I watched this part of the episode twice and no trees are missing in the window behind Mr. Weed after the close-up on Peter. Actually, Mr. Weed's head is covering part of the window where you can't see the trees on the right when he's lying on the table, but when he gets up you can see all the trees.
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Peter is sharpening the pencils, the ones that he throws on the table are much shorter than what he sharpened them to.
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Peter goes to Mr. Weed's office for skipping work to go to a baseball game, he has a piece of paper in his right hand. When the shot changes, however, the paper is in his left hand.
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When the bosses are discussing sending Peter to Washington, all the paper on the desk disappears instantly. (00:12:30)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When waiting for Peter to get home from work, there is a plate with a bone on in front of Brian, When Brian asks how Peter can afford lobster, the pate has changed into a proper meal. (00:05:30)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: The bosses chuck a dog out of the window and shoot it like a clay pigeon, When they do there is a chair at the table with its back to the window. In the camera angle from the window, this chair has disappeared. (00:05:30)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: El-Dorado places a snooker table and table tennis table in the toy factory among other things. When we see the bosses up in the office, the snooker table has disappeared. (00:05:00)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: At the baseball game, there is a man behind Peter in a red top, with a man to his left. This man turns into a woman for some shots. (00:03:10)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Peter catches the ball from in front of the sick kid, his buttons on his Boston jacket swap sides. (00:02:30)
Mr. Griffin Goes to Washington - S3-E3
Continuity mistake: When Peter is talking to Mr. Weed at the baseball game, the shade of Peter's hair color changes from lighter to darker and vice versa multiple times. (00:03:35)