A Clean Conscience

S4 E17: Sydney and Nadia are shocked to discover that Sophia (Sonia Braga American Family Kiss of the Spider Woman ) -- the head of the orphanage that cared for Nadia as a child -- has been severely beaten. But Sloane fears for Nadia's life when he learns the reason for the beating. Meanwhile Dixon is faced with a life-altering moral dilemma while on a mission with Vaughn and Jack's doctor (Michael McKean Best in Show This is Spinal Tap Laverne & Shirley ) offers some advice to his ailing patient.