The siege of Vienna (1683) was an epic history-making event. Sultan Mohammed II and his Grand Vizier, Kara Mustafa, eyed the "Golden Apple" of Vienna with great hunger. If Vienna, the capital of the Holy Roman Empire fell, the spoils of Poland, Germany, France, and Italy lay ripe for the picking! At first two hundred thousand Muslim soldiers fought against twelve thousand Austrians at the Vienna city walls. Weeks later sixty-five thousand Poles and Germans arrived and fought the Muslims out on the battle field. In this last episode in my Crusades series I narrate the heart-stopping battle. What finally woke Western Europe from its long-standing languor, its sleep? What kind of ostentatious things did Kara Mustafa keep at his war camp? In the show's opening I raise two challenges each for Christianity and Muslim. No, my questions are not theological. They are more simple: what will each religion do in order to safeguard the future of humanity's existence? Come and think deeply with me about our lives in Christ.