Welcome to Plathville star Lydia Plath can still recall details of her 17-month-old brother Joshua's tragic death. "I remember specific details about his childhood. I remember that afternoon he was sleeping on his blanket in the sun, and then every detail of the accident I remember all too well," Lydia, 21, said on the Wednesday, January 7, episode of the "Unplanned" podcast. "I was in the car when it happened." Lydia's mom, Kim Plath, accidentally ran over son Joshua with a vehicle in 2008. The death was ruled accidental and Joshua's cause of death was listed as "head injuries.