: Despite Lyra's desperate attempt to save him, Asriel successfully severs Roger from his daemon, killing the boy but generating enough energy to tear a hole in the sky.

: Mrs. Coulter arrives and meets Asriel at the rift. He invites her to join him in his war against the Authority, but she refuses, choosing to stay and search for Lyra.

: Lyra arrives at Lord Asriel's mountain lab, bringing him the Alethiometer. Initially, Asriel is horrified by her arrival, but his mood shifts when he realizes she has brought Roger with her.

: Sacrificed by Lord Asriel to open the bridge.

: Several casualties occur during the skirmishes surrounding the Magisterium's pursuit. Major Themes

In the Season 1 finale of His Dark Materials , titled the story reaches a devastating climax as Lyra Belacqua finally reaches Lord Asriel's laboratory in the North, only to discover the horrific cost of his scientific ambitions. Plot Summary

: The episode confirms that the Magisterium fears Dust as "original sin," while Asriel views it as the key to ultimate knowledge and freedom.