Filling in for Megyn Kelly on Friday, TODAY’s Al Roker and NBC’s Keir Simmons and Jacob Soboroff share the story of David Levine, a father and pediatrician who discovered he was suffering from postpartum depression. Levine joins the show along with Dr. Catherine Birndorf, psychiatrist and co-founder of The Motherhood Center, and Erika Cheng, assistant professor of pediatrics at Indiana University School of Medicine.