The Old Man and the Lisa - S8-E21
Continuity mistake: When Lenny is sitting at Mr Burns' desk, you can see there is nothing in front of him on the table, but in the next shot a "Lenny" name card appears.
The Old Man and the Lisa - S8-E21
Continuity mistake: When Smithers tells Mr Burns that his money has gone, you can see there is nothing on the blue pad on the table, but in the next shot two fountain pen holders have appeared.
The Old Man and the Lisa - S8-E21
Continuity mistake: When Principal Skinner is at the Recycling Centre, you can behind him there are steel drums but in the next shot they have changed to newspapers.
The Old Man and the Lisa - S8-E21
Continuity mistake: When Mr Burns is speaking to his lawyers in his office, there is a blue pad on the table that keeps disappearing and re-appearing between shots.
The Old Man and the Lisa - S8-E21
Continuity mistake: When we see Mr Burns speaking to his lawyers, you can see there is a book stand on the table, but in the next shot it has gone.
Continuity mistake: The doormat at the Blind Man's house is initially coloured blue, but when Bart steps on the squeaky toy, look at the mat and you can see there is now a dark blue border around it.
Continuity mistake: When Bart sees Santa's Little Helper by the window at the Blind Man's house, the window frame is divided into sections but in the next shot it is plain.
Continuity mistake: When Bart goes to push the doorbell on the Blind Man's house, the doorbell is initially on the wall but in the next shot it is on the doorframe.
Continuity mistake: When Willy is speaking to Bart, you can see there is a plate in front of him when he tosses the bone away, but when we see Willy a couple of shots later, the plate has gone.
Continuity mistake: When Moe is talking to the Repo Depot Proprietor, the till on the desk changes position between shots.
Continuity mistake: When Bart arrives at the Repo Depot, he has nothing in his hand, but when he walks through the door, a photograph suddenly appears.
Continuity mistake: When Marge is speaking to Bart at the dinner table, there is a fork by Bart's plate that disappears in the next shot.
Continuity mistake: When Bart and Laddie are at the Springfield Town Hall, you can see there is nothing on the wall behind them, but in the next shot a plaque appears.
Continuity mistake: When Bart is talking to Milhouse in the park, there are two pine trees in the background. When we see the two a little later, the pine trees have gone.
Continuity mistake: When the man in the park throws a Frisbee for Laddie to fetch, the Frisbee can be seen falling to the ground, but when we see Laddie running, the Frisbee is back in the sky again.
Continuity mistake: When Laddie is eating the meat that Bart gave him, Santa's Little Helper's bowl is next to his bowl. When we see Laddie two shots later, there is now only one bowl, and in the shot after that, there are two bowls.
Continuity mistake: When Bart asks his mother if he could feed Laddie during the dinner scene, he has a glass in front of him on the table. But when we see Laddie eating, Bart's glass has gone.
Continuity mistake: Marge is holding a leaflet containing Laddie's instructions when Homer wonders where the dog is, but when Laddie returns, she no longer has the leaflet.
Continuity mistake: When Homer says "Where did he go?" when Laddie wanders off, Marge is standing in front of an archway. In the next shot, she is standing in front of a cabinet.
Continuity mistake: There is a latch on the crate when Bart opens it and Laddie appears, but when Laddie jumps out of the crate, the latch has gone.
Answer: Willy referred to an encounter he believed he had with actual aliens, while Wiggum thought he was referring to the arcade game.