The kindly Elwood P. Dowd, the insistent L.B. Jefferies, the hypnotized Scottie Ferguson, the fast-talking MacCauley O’Connor, the complicated Ransom Stoddard. The man who was always billed as James Stewart, but was so beloved that an entire country called him Jimmy. The man whose Oscar was on display on a shelf in his father’s hardware store for more than three decades.