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.
Character mistake: During the radio show, the radio host gives the radio station's phone number as 555-4455, Alf then softly repeats the number back before he gets to the phone. He then picks up the headset and dials a number, but the numbers he presses on the phone don't match up to the number given by the radio station.
Audio problem: After Alf calls the radio station and tells the station to give Jody his phone number, Alf walks to the towards the table saying "Friend...wish I had one" with the phone in his hand. Right after Alf says "Friend..." listen closely in the background and you can hear a far off phone ringing about 2 seconds before the one Alf is using starts.