Dharma & Greg (1997)

Turn Turn Turn - S2-E3

Continuity mistake: In the first episode, when they meet as children, they seem to be about the same age. But later episodes refer to Greg as a 32-year-old lawyer, and after 2-3 years of marriage, Dharma is having her rebirthday party, which happens every 7 years. She is 28 then, so it seems like Greg is at least 5 years older, which is very noticeable as children.