Lyra and Will look for a means to enter into the Tower of the Angels, to find the knife. Boreal tries to lure Mary Malone to get her research about the Dust, but she sends him away. Lee and Grumman meet each other and they team-up to protect the subtle knife from going to wrong hands. Lyra and Will find an entrance to the tower and they meet the bearer of the subtle knife, Giacomo Paradisi, and he tells that a boy has just stolen the knife from him. The boy is Tulio, who confronts Will and Lyra and cut two fingers of Will off before he is subdued. Will learns from Giacomo how to open and close a window to another world and becomes the bearer of the knife. Serafina Pekkala, Ruta Skadi and other witches that survived the Magisterium attack gets revenge.
"Tower of the Angels" is another good episode of "His Dark Materials", with Lyra and Will achieving the magic subtle knife. The reason why Will need to lose to fingers is silly and hard to understand why the boy has to be mutilated in a juvenile movie. The war between the witches and the Magisterium is eminent. My vote is eight.
Title (Brazil): "Tower of the Angels"