The Darkest Hour (1919)
Wealhy New Yorker Peter Schuyler has a best friend in Lee Austin--so he thinks. Actually, Austin and Marion Dinsmore have a scheme whereby Marion marries Schuyler, then divorces him, gets a big settlement and marries Austin. However, their plans go awry when, during a robbery, Peter is hit on the head and develops amnesia. He winds up in a lumber camp far in the Northwest woods, where he calls himself John Doe, and soon marries the niece of the camp's manager, a crook whom Peter soon helps to expose. However, it turns out that Austin and Dinsmore haven't quite forgotten him.