Will and Lyra decide to travel to Will's Oxford, to seek out his lawyer and to find a scholar to help Lyra about the Dust. Soon she fins that the Jordan College does not exist in this world, but the alethiometer tells her to go to St. Peter. Will schedules with Lyra to meet each other at the Botanic Gardens at 5 PM. At the Magisterium, Dr Lanselius is sentenced to prison, and Ms. Coulter convinces MacPhail to authorize the bombing of the witches. Will meets his lawyer and she tells him that she cannot give the money from his fund to him. She suggests he visits his grandparents and asks them. Meanwhile, Lyra meets the physicist Mary Malone that shows her experiments with the Dust.
"The Cave" is a good episode of "His Dark Materials", with Will and Lyra in his city trying to resolve their issues. Will wants to know how his mother is and where is his father. Lyra decides to learn about the Dust in another world. Ms. Coulter, as usual, is a Machiavellian and manipulative villain. My vote is seven.
Title (Brazil): "The Cave"