The Shadow on the Wall (1925)

George Walters is a youth who is dominated by Bleary, a heartless bully, who forces him to pose as the son of millionaire George Warring, kidnapped as a baby. The missing son had a twin brother who had recently died, but a painting of the shadow of the late son is on one wall. Walters' shadow matches this painting perfectly, establishing him as the missing son to the Warring family. Walters falls in love with Warring's daughter Lucia and finds that the family attorney Glaxton is slowly poisoning the old man.

Unfortunately the movie The Shadow on the Wall is not yet available on HBO Max.