Sabrina's heck-raising cousin, Amanda (played by Melissa Joan Hart's sister, Emily), is sent to live in the Mortal Realm for a year. Rather than have her stay at the Spellmans', though, Hilda and Zelda arrange for Sabrina to help get Amanda into a special school for maladjusted young witches. James: Charles Shaughnessy. Robin: Jane Sibbett. Phil: Blake Clark.