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It starts out as a standard family sitcom called "Valerie" about a mom juggling the demands of work, three boys and a frequently absent airline pilot husband. Then after star Valerie Harper has a falling-out with producers, her character is killed off. Enter Sandy Duncan as the live-in aunt and surrogate mother figure, which leads to renaming the show first "Valerie's Family" and then "The Hogan Family." In addition to light sitcom fare, the show tackles "very special episode" topics like the death of a parent, drunken driving, teen sex and AIDS. Wikipedia