Mon, Jul 29, 2013 7:57 PM EDT 2:11
On an upcoming episode of “Who Do You Think You Are?" Christina Applegate learns a little bit more about her family than she bargained for. Through investigation, the actress discovers that her paternal grandmother, a woman she never knew, abandoned Applegate’s father at a young age. The 41-year-old also learns some unfortunate news about her grandfather that takes her breath away.