This episode, Ash and Tilly have been given a quest by Dr Otalp to write a project proposal for the underwater landscape of Sitnalta, which used to be a land bridge connecting the ancient civilisation of Atlantis with the main continent. To help them write the proposal, they’ve enlisted the help of archaeologist, curator, editor, and all-round superwoman Dr Sasja Van der Vaart-Verschoof. Together, they will tackle those burning questions: What other underwater landscapes have there been? How important is a PhD to a future in freelance archaeological work? And what is the link between a gnome and a helicopter? Tune in to find out!