"The Duncans are a typical family whose lives are turned topsy-turvy with the arrival of new baby sister, Charlie. With their parents juggling full- time careers, it’s chaotic for the Duncan kids, Teddy, PJ and Gabe who endure everything from burp cloths in their backpacks to formula stains on their clothes. These kids have a lot more on their plate than just homework; they must learn how to take care of their baby sister while navigating typical teenage life." -- iTunes Store
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Teddy moves her study date with a cute boy from the library to home so that she can help Bob take care of Charlie. When Bob injures himself and PJ has to take him to the hospital, it leaves Teddy and her date watching Charlie.
the fine print: Downloads posted on the Free iTunes Downloads blog are usually free for ~1 week. After that, you'll have to pay for them.