The Replacement leaves viewers 'hooked' with EXPLOSIVE ending between Paula and Ellen

So far, show watchers have seen Ellen become more and more suspicious over her maternity leave replacement Paula on the chilling BBC One thriller. On last night's episode, Ellen tried to investigate her "replacement" after suspecting Paula may have been responsible for her boss and best friend Kay's fatal building site fall as well as having an affair with the late character's husband David.And in a bid to find out more about Paula's ...