Desc: The Only Son: Directed by Oscar Apfel, William C. de Mille, Cecil B. DeMille, Thomas N. Heffron. With Jim Blackwell, A. MacMillan, Thomas W. Ross, Jane Darwell. Thomas Brainerd, Sr., as a prospector, is a dutiful and loving husband and father. Two children, Gertrude and Thomas, Jr., are born while the Brainerds live in a log cabin in the mountains. Brainerd strikes gold, goes to New York, where he becomes a financial power. He neglects his wife, devotes every moment of his time to his growing industries, simply supplies funds to his family, and his wife, alone and melancholy, is fascinated by an artist and consents to "sit" for a painting. Feeling her neglect keenly, Mrs. Brainerd becomes a victim to the wiles of the artist, who, however, is killed by the husband of a former victim before the affair has progressed too far. Brainerd, learning of his wife's affair with the artist, orders her from the house. Thomas, Jr. sides with and accompanies his mother. Heretofore a worthless spendthrift, Thomas now becomes ambitious and joins interest with a penniless inventor, goes west, establishes a factory, makes a go of it, sells out to his father at an enormous advance, convinces his father that his mother is innocent and, as he transfers the invention to his father's firm, sees his mother in his father's arms, which example he immediately follows by proposing to the girl he has always loved.