St. Elsewhere 2x20

Ehrlich tries to deal with his Aunt Charice and her romantic designs on Dr. Westphall as he crams for the National Boards; a stressed-out Armstrong makes a tragic misdiagnosis; White chooses to take a polygraph test before his trial begins; Shirley tells Cathy that she ""asked for it"", and Cathy's past is used to decimate her on the witness stand.