Fox Broadcasting Co. will replace “Good Grief with “Married… With Children” spinoff “Top Of The Heap” in late February and immediately expand “Cops” to an hour to fill the void left by “American Chronicles.” Spring backups include “The Last Hurrah,” docu series about senior year of a Midwestern high school; “Blood Ties,” gothic drama from “Dynasty” creators Esther and Richard Shapiro; “Urban Anxiety,” a Propaganda Films sitcom; and interactive “Fantasy Park.”

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