Watch Online Free on Watchseries. In the revolting and decaying Byzantium Hotel, young heroin addict Alex, played by Dexter Fletcher, relives an idyllic - and possibly apocryphal - past before slipping into a much more terrifying world. A sinister little girl wanders the corridors, cutting open her doll "to see what's inside" while winos and junkies prowl as flesh-eating zombies...