The actresses for Molly and Heather are actually sisters in real life.
The town librarian is played by Mary Downing Hahn, author of the book on which the film is based. Hahn happened to mention during filming that she had always wanted to appear in a film of one of her own books, and the director added a small speaking role for her.
The actresses for Helen and Missing Girl #1 (Anna and Abby Pniowsky) are real-life sisters.
Airs on Lifetime as "Little Girl's Secret"
In the book, Dave is a pottery maker. In the film adaptation, he is an author.