Plot: All new — Incredible stories of survival, including a Broadway set designer who spent five weeks in a coma with COVID-19 until an experimental treatment saved his life; the young star of Netflix’s “Raising Dion” refusing to let brittle bone disease break her spirit; a Florida woman who beat the odds after a boating accident left her on the brink of death; a boy recovering from a one-in-a-million fall; and a man living with an undetected 30-pound tumor.