The third and fourth wives of Drew Peterson both vanished mysteriously. On this episode, Marcia Clark examines how Stacy Peterson and Kathleen Savio ended up married to Drew, what happened to them, and how they might have been saved. Featuring Kathleen's lawyer Harry Smith, Kathleen's sister Susan Doman, Stacy's friend Sharon Bychowski, Stacy's Aunt Candace Aikin, and Jacquie Marroquin, Director of Programs at the California Partnership to End Domestic Violence.

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