With Carl the new prime suspect and all eyes on the Tuckman House, Martin finds himself backing Zoe when a visit from social services regarding Caitlin’s welfare shocks them both. A distraught Zoe questions her own fitness as a mother, leading Martin to overstep his professional boundaries. It is the day of Gemma’s 30th birthday and the residents of Westbury Street are determined to keep Gemma’s name in the press, holding a birthday lunch in her honour. But Zoe is left reeling when she makes an upsetting discovery and as the birthday lunch gets underway, secrets are unearthed as Zoe clashes with Tim and Kate, Carl comes under fire and Kate shocks the surveillance team when she takes the search for Gemma to a new level.