Worldwide premiere in Republic of Ireland, on RTE One at 28th May 2017 - as usual at 9.30pm, 4 days before the UK's BBC One premiere on thursday at 8pm. Additionally, none of the episodes in this series are released on the RTE Player, until BBC One has broadcast them. Presumably an understandable "gentleman's agreement" to reduce Spoilers leaking from the Irish episode premieres ahead of the UK.