Family Matters (1989)

Scammed - S7-E21

Continuity mistake: During the scenes where they play Mortal Grandma (or whatever it's called), the characters' health bars don't change.

Dream Date - S7-E22

Continuity mistake: Laura says that Steve asked her to be his prom date when they were six years old. In other episodes, she has mentioned that she first met him as a blind date - their date in the first season.

Scammed - S7-E21

Continuity mistake: Carl tells the establishment's owner that Eddie and Waldo are under the age of twenty-one. However, in the episode "Best Years of Our Lives" (also Season 7), Waldo tells Maxine that he worked on a parade float every year in high school, which makes seven floats. If he failed three grades and started college in the previous season (with Eddie), he would be at least twenty-one years old by now - probably twenty-two.