They are quiet figures at the center of some of the Bible's most miraculous moments. They steeled David against Goliath, warned Abraham of Sodom's destruction and freed Peter from jail. But while the work of angels has long stirred popular imagination, wonder and debate cloud the details of their holy purpose. What do the Scriptures tell us about them? Are they messengers from Heaven? What do they look like? Do they continue to guide and help us today? And what happened to the "fallen angels?" This extraordinary program searches for clues in the stories of the Bible's heavenly spirits, from the archangels Michael and Gabriel to the ethereal forms that announced Christ's birth and resurrection.