The Other Woman (1921)

Langdon Kirven suffers from amnesia and has no recollection of his wife, children, or former business, having taken on another identity, that of John Gorham. After 5 years Spencer Ellis, Kirven's best friend, recognizes him in the park; but when he approaches, he notices the difference in personality and assumes that it is a matter of close resemblance. Nevertheless, Ellis offers the man a job in another city. After two years Kirven reaches a prominent position, but when he becomes engaged to Ellis' cousin, Ellis returns to expose him as a former convict and as a married man. The shock jars his memory, and he returns to his family--but only temporarily, for he again becomes John Gorham and returns to Ellis' cousin, whom he marries. When his second wife has a child, Kirven's first wife, now aware of his sickness and his position, tells him it is best to give the other woman the protection of his name.