The Replacement - Season 1 Episode 1

Ellen gets pregnant after landing a big contract for her firm of architects. She hires Paula as cover but soon fears she's made a terrible mistake. Ellen wants to get back to work quickly but Paula thinks Ellen should be putting her baby at the centre of her life. She wastes no time in moving in on Ellen's bosses, clients and friends and Ellen fears she's being forced out. Everyone thinks Paula is great and Ellen is being paranoid until a site accident puts Ellen's suspicions into overdrive.