Mona and Dee Dee are half-sisters who share the same father. They are completely unlike each other, but they live in the same apartment building, so disagreements are common.
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All the episode titles follow this format: The Big...Episode. See more
In the pilot, Mona moves to the upstairs apartment which is on the right. Later, when Dee Dee is renovating it, it's on the left. See more
Big Dee Dee Thorne
Well, since no one has offered to buy me a drink, I guess I'll buy my own. Now I know how Phyllis feels.