Guest Stars Jemima Rooper as Medusa Amy Manson as Medea Ken Bones as Melas Peter de Jersey as Goran Lorcan Cranitch as Cilix Anya Taylor-Joy as Cassandra Emmett J. Scanlan as Delmos Thomas Coombes as Critias Sam Swainsbury as Nestor John Draycott as Tavern Owner Jason Cheater as Soldier Jason Baughan as Patrol Guard