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