I'm reminded of the short story "The Strange Case of Mr Pelham", in which a man is stalked and eventually replaced by a doppelganger. https://en.wikipedia.org/

I'm reminded of the short story "The Strange Case of Mr Pelham", in which a man is stalked and eventually replaced by a doppelganger. https://en.wikipedia.org/wiki/The_Strange_Case_of_Mr_Pelham https://en.wikipedia.org/wiki/The_Strange_Case_of_Mr_Pelham