The 20th Century Fox Hour - Season 2 Episode 12 City in Flames
Overview: During the time of the great Chicago fire, the two O'Leary brothers become bitter political and romantic rivals for the beautiful stage actress, one brother is a notorious gambler and the other a pious reformer. After Mrs. O'Leary's cow knocks over the fabled lantern, we are treated to generous stock footage from In Old Chicago's climatic conclusion.