In the season finale, Jack and Bobby discover that Grace plans to visit their father, Juan (LOU DIAMOND PHILLIPS - La Bamba, Hollywood Homicide), in a Texas prison. Bobby insists on joining her, and along with Jack they embark on a spontaneous road trip, during which Grace is forced to reveal the shocking reason their father is in prison. The future reveals Jack's heartbreaking fate and details Bobby's unlikely road to the presidency. And, for the first time, the voice of President McCallister (Academy Award winner TIM ROBBINS - Mystic River) is heard. Author GORE VIDAL appears as the Host of the McCallister documentary, and producer NORMAN LEAR (All in the Family) portrays the elderly Peter Benedict, Bobby's future father-in-law.