Valtos (1987)

Valtos is a story told from thirty years hence, in the last moments of its narrator, who awoke one day in 1987 'with the knowledge that I had been duplicated during the night, and that I was an inferior replica of myself'. There follows a relentless, epic, pursuit of an absconding phantom - his 'original' - which ends in catastrophe at Valtos, a place at once ethereal and terrifying.

Unfortunately the movie Valtos is not yet available on HBO Max.