Following the photo gallery from yesterday, Universal Pictures has unveiled a new featurette for Mama. Executive producer Guillermo del Toro takes us through the story of this white-knuckle thriller, centering on two orphans taken in by a loving family after spending five years in the wilderness alone. Watch as never-before-seen footage and on-set interviews with stars Jessica Chastain and Nikolaj Coster-Waldau offer insight into this creepy yarn about dead parents and the children they've left behind.