gone, they've been trailed by a mysterious Man in Black. He tends to appear just before a dangerous explosion or cave-in—the kind of trap someone would set if he wanted to eliminate Amy and Dan from the competition. However, the Man in Black saved Amy and Dan's lives in Russia . And, even stranger, spies report seeing him visit Grace Cahill's grave. Has he been paying his respects? Or has he been begging forgiveness before he does something unthinkable?