We lost an icon earlier this month with the passing of Kirk Douglas at the age of 103. But what made him such an era-defining star in classics like "Spartacus"? That indomitable chin? That triangle torso? No, there’s something deeper and cannier to how the heartthrob-turned-super-producer cemented his own role as a prophet in the mid-century American movie religion. This week, Be Reel looks back at five movies that defined Douglas' career: “Ace in the Hole” (1951), “The Bad and the Beautiful” (1952), “20,000 Leagues Under the Sea” (1954), “Paths of Glory” (1957) and “Spartacus” (1960).