Continuity mistake: After Brian finds the note Alf left, we see William put the note under the microscope to inspect the tear drops. When William says "I'm going to go find him," he stands up and we see him leave the note on the microscope. When the camera cuts to William walking through the door, he all of a sudden has the note in his hand that was left on the microscope. (00:12:55 - 00:13:35)Justin Davis
Continuity mistake: At the beginning of the episode, Mrs. Tanner scolds her son Brian for dumping all of the clothes from the clothes basket. When she first scolds him the basket is white; it cuts again to her, and now the basket is brown and a different shape, too.
Continuity mistake: After Trevor shows Kate and Willie the house for sale sign, Alf is in the kitchen talking into a tape recorder about being blackmailed. There are soda cans to Alf's right next to the recorder and one can of root beer on its side just above the recorder. When it cuts to Kate and Willie walking into the kitchen, the downed can has been moved, and the red can of cola is gone. After Kate says "And it wasn't my mother, either", there's a close up of Alf and the cans are back. (00:04:25 - 00:07:05)Justin Davis
Continuity mistake: After Raquel leaves the Tanners' house after she asks the Tanners about Elvis being next door, Willie walks into the dining room and Alf is sitting at the table with the Elvis sightings book next to him. Throughout the whole "Kings comparison" between Willie and Alf, the book on the table changes positions after every few cuts from Alf to Willie. (00:03:30 - 00:05:00)Justin Davis
Continuity mistake: After Willie takes Alf into the kitchen to talk to him about someone at the Halloween party might realise that he's an alien, notice the zipper on the front of Alf. Out of nowhere, during one cut, a piece of black tape appears at the top of the zipper going across the top of Alf's chest that wasn't there before, then disappears in the next cut.Justin Davis
Continuity mistake: When Alf calls Air Force One the second time (after Willie has been arrested) we can see that Mr. De Foe is playing solitaire. After the guy who answers Alf's call says "You might want to try that 4 of Spades on that 5 of Diamonds", Mr De Foe drops a small stack of cards on some of his already played cards and says "Just place the call and trace this one." The camera then cuts to the guy who answered Alf's call but when it cuts back to De Foe, the cards he dropped are now neatly stacked in front of him with out anytime to have replaced them. After the cuts of De Foe talking to Alf, De Foe eventually saying "I'll see what I can do" and the cards are back lying on his other cards like they were when he first dropped them. (00:13:55 - 00:14:30)Justin Davis
Continuity mistake: After Dorothy tells Alf that her 'mop from the moon" comment was an insult, Alf says "If I had a straw and a napkin, I would fill you so full of spit balls." while Dorothy is looking right at Alf but when the camera cuts to just Dorothy, she is all of a sudden looking upwards as she says "Do you hear how he's talking to me?" (00:16:55)Justin Davis