“Ernest Hemingway: Rivers to the Sea,” an atmospheric profile of the literary icon (1899-1961), features readings of his works (by Kate Burton) and letters (James Naughton). Also: interviews with Hemingway's son Patrick, daughter-in-law Valerie and sister Carol Hemingway Gardner; and biographer A.E. Hotchner. Written and directed by DeWitt Sage, a Peabody winner for his 2001 “American Masters” biography of F. Scott Fitzgerald.