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)
Continuity mistake: The plane that Willie jumps out of changes from the first shot to the shot when Willie jumps out of it.
Continuity mistake: When Lynn and Willie put ALF on the coffee table, his head is on the side of the kitchen. When ALF wakes up, his head is now on the other side.
Don't It Make My Brown Eyes Blue? - S1-E8
Continuity mistake: Kate puts a towel on top of the dryer - it is partly hanging off the edge. The shot changes and it is no longer hanging off the edge.
Don't It Make My Brown Eyes Blue? - S1-E8
Continuity mistake: At the end of the opening scene Willie moves one of the cups in front of him to the middle of the table. The shot changes and they are now both in front of him.
Visible crew/equipment: When the family walks into the kitchen after ALF was talking to Jody, you can see the set lights.
Continuity mistake: When ALF writes the letter he uses a pencil, but when the camera shows the letter it is written in red ink.
Strangers in the Night - S1-E2
Visible crew/equipment: After Mrs. Ochmonek closes the door after the pizza is delivered, a shadow of the boom mic can be seen on the door.
Visible crew/equipment: Right after Kate tells ALF he is not to drink beer a boom mic is visible.
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)
Audio problem: When ALF is starting to put the clothes pin under his mouth, you can hear a far off yelling in the background about a second before ALF actually starts to yell. (00:12:25)
Visible crew/equipment: After Neal answers the door, Mrs. Watson asks 'May I come in?' When the camera cuts back to Neal saying 'Oh gee do you have to?', look in the background to see a shadow of a person move across the cabinet. (00:12:00)
Continuity mistake: When Willie is trying to tell ALF what labor is, the phone on the table keeps going from being on an angle to straight.
Hit Me With Your Best Shot - S2-E21
Continuity mistake: Lynn pours milk on her cereal and she starts to put it down. The shot changes and she starts to pour the milk again.
Hit Me With Your Best Shot - S2-E21
Continuity mistake: After ALF breaks the board, Brain puts one piece in front of him. When Willie walks in it has moved to the middle of the table.
Working My Way Back to You - S2-E1
Continuity mistake: When Kate tells ALF that he's won she is not holding anything. The shot changes and she is now holding an orange.
Continuity mistake: When ALF is writing down what Kate and Willie are saying the paper he is writing on is in a different position in one shot.
Visible crew/equipment: When Kate says they are going on a hike a boom mic is visible.
Continuity mistake: When Kate says "I don't believe this" she is holding a cup. The shot changes, she isn't.
Continuity mistake: During the opening scene Lucky keeps changing position.
Answer: Mr Tanner actually asks Alf, "Why are you carrying our towels through the den?" The streaming subtitles are wrong when it substitutes "damp" for "den" twice. It's possible the error originated from the VHS or DVD, which occurs often.
Super Grover ★
Yes, I was re-watching episodes, and I heard "den" the next time. Thank you for answering, though.