Four History Channel programs explore the life and political career of John F. Kennedy. In "JFK and PT 109: A Hero in Question," the sinking of the boat under his command during World War II is revisited; "The Great Debates" features the entire first TV debate between Kennedy and Nixon; "Great Conventions: 1960" commemorates his nomination for president; and "Bay of Pigs: Declassified" examines the foreign policy fiasco that embarrassed his administration. 140 min. total. Standard; Soundtrack: English.