When the body of a young woman is found buried in a shallow grave on a bleak Pennine moorland, Carol calls in Ridley to assist with the case. But the victim was not all she seemed to be. Ridley discovers she was leading a secret double life.

Egypt’s incredible history is seen from above with its many pyramids and the unique Sphinx, as well as sites central to its many faiths including the largest mosque and cathedral in Africa. The episode then tackles traffic, new roads, and the Nile River; and sheds light on Cairo’s iconic squares, the Grand Egyptian Museum, the magical coastal city of Alexandria, and the beautiful oasis of Siwa.

As Christian struggles with his past, Hanna contemplates throwing him in at the deep end once again — as an undercover agent in a dangerous bid to infiltrate The Circle.