CEO Elaine is keen to say 'Croeso' to the world from their new premises. Elaine also visits a museum stockroom and gets up close and personal with the artefacts expert and his mummy. Elsewhere, Wales is gripped by Banksy fever following the discovery of his artwork in Port Talbot. Have Wyn and Charlotte managed to persuade the mysterious genius to create some bespoke art on the Wow Wales office wall? The whole staff are proud of the new premises, however, they have to contend with an environmental protester who is sticking to his principles and proving difficult to shift. Meanwhile, Gwilym attracts international recognition for his ultra-grim walking tour – the Trail of Tears.