Continuity mistake: When Opie surprises Andy by telling him that he wants to take piano lessons with Clara, he heads to the piano to play what he already knows, and when Opie plays Chopsticks on the piano he's wearing a different shirt.
Daddy's Little Beauty - S4-E12
Continuity mistake: When Fred is trying to work out what kind of talent Pebbles has, she has her bathing suit on. When Pebbles is seen crawling onto the stage when it's her turn, she has her regular clothes on, and when Pebbles is on the stage with Dino, she has her bathing suit on again.
Other mistake: The opening credits on the first ever episode of Coronation Street in 1960 give the copyright year in Roman numerals as MCMLXIX, which is 1969, and not MMX, which is 1960. (00:00:01)
Same Picture, Different Frame - S4-E2
Continuity mistake: While Morgan is driving she gets a flat tire, and in the close-up the Cadillac's license plate number is 84-I33, but in the wide shot it's 5G6-420. (00:09:20)