After a brief cameo on When Calls the Heart's season 13 premiere, Brooke Shields is headed back to Hope Valley for a two-episode arc that fans won't want to miss. "Everybody's in a very different place in their lives [after] these past years, and a lot's gone on," Shields, 60, exclusively told Us Weekly on Thursday, February 26, ahead of her first episode back as Charlotte Thornton on the Sunday, March 1, episode. "There's many different emotional story lines that they all need to sort of reconcile.