A fan site for Andrew Gower, who plays James Hadfield in Poldark S5, has been compiling a list of international air dates for the series. Many countriess, such as UK, Belguim, Netherlands and Spain have alread started airing it.. but they list upcoming dates for US, Australia, South Africa and more. They plan to update as they get more info.
You can check out what they have listed so far here:
Andrew-Gower.co.uk – Poldark Air Dates
Photo below: Andrew Gower, top left, as James Hadfield in Poldark S5. credit: BBCOne