Continuity mistake: When Wilma puts Pebbles and Fred to sleep in their beds, Wilma puts her left hand on Pebbles' blanket, but in the next shot her hand is not there.
Continuity mistake: After the formula explosion in the garage, Fred's face and arms are covered in black marks, but when we see him just seconds later, he is now completely clean.
Continuity mistake: When Fred knocks on the door at Barney's house, the door is initially plain, but when Barney opens the door, it is now made of wood.
Continuity mistake: When Fred goes on the tube to squeeze out some toothpaste, he puts his toothbrush at the end of tube, but the toothpaste he puts on his brush suddenly disappears.
Continuity mistake: When Fred and Barney are at the nurse's desk at the doctor's surgery, Barney is beside Fred when the nurse sees him, but in the shot of the nurse tickling Fred's chin, Barney is missing.
Continuity mistake: When Barney drops Fred off at his home, Fred is standing on the pavement, but in the next shot he is now standing on the grass.
Audio problem: When Barney says "You're about two feet too short" when Fred steps onto the scales, his mouth does not move when he says "short."
Continuity mistake: When we first see Fred and Barney on stage at "The Ed Sullystone Show", the curtain behind them has creases, but in a close-up of the two, it appears completely flat.
Continuity mistake: When Fred sees the small boulder going downwards on the scale, his eyebrows are missing, but re-appear seconds later.
Continuity mistake: When Barney is knocking on the door at Fred's house after seeing an advert in the newspaper, Fred says "I'll get it, Wilma!" and stops near the door. At this point, Fred is well away from the door, but in the next shot he is now standing near the corner of it.
Continuity mistake: When Fred starts shrinking after he has drunk all of the reducing formula, he is holding a mixing bowl in his right hand. When he has fully shrunk, the bowl is nowhere to be seen.
Continuity mistake: At the auditions for "The Ed Sullystone Show", there is a man with a performing dog and when we first see the dog, he has a collar around his neck. When he starts performing, the collar has disappeared.
Continuity mistake: When Fred steps on the scales with the reducing formula, there is a table with chemistry equipment behind him. In the close-up of Fred in the next shot, the table disappears, and in the shot after that, it is back again.
Continuity mistake: When the bird flies back into its box after telling the doctor that Fred and Barney have arrived, the switch on the box is initially pointing down but in the next shot it has moved up.
Continuity mistake: When the nurse says "What a cute little boy!" to Fred at the doctor's surgery, you can see there nothing around Fred, but when the camera closes in on Fred in the next shot, small rocks have appeared.
Continuity mistake: When Bamm-Bamm is placing the plank of wood into the sandpit, you can see that by the sandpit there is a bucket with a spade in it, but in the next shot the spade is now positioned near the sandpit.
Continuity mistake: When the doctor tells Fred to take aspirin twice daily, Fred is positioned near the corner of the doctor's table and Barney is right behind him. But in a close-up of Fred in the next shot, Barney is nowhere to be seen.
Continuity mistake: When Fred is standing next to Ed Sullystone and Ed says "Dumb-looking too" to him during the audition, Fred's size decreases between shots.
Continuity mistake: When Pebbles is playing with her blocks on the rug, she puts a white block with a red "L" on it by her side that disappears a few shots later.
Continuity mistake: When Fred is at Barney's house, he knocks on the door and says, "Open up, Barney, it's me!" When the door opens, Fred's arm disappears.
Answer: The ratings had declined in its last few seasons, and the series was cancelled.
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