His Dark Materials season 2

 So finally Noshi and me have gotten around to watching this loveable series based on the books of the same name by Philip Pullman.

Though most probably know it by the title of the movie that was based on them, The Golden Compass.

Having gone through the crack at the end of the first season, Lyra finds herself in another world, and stumbles upon a city.  Seemingly abandoned, she runs into a boy named Will.  he also came there from another world (ours), and soon they find other young children.  It turns out a curse is over the city, as spectres take down all the adults and turn them into zombie like beings.

Meanwhile, Ms Coulter, having struck an alliance with the Magistarium, tortures a witch to find out where Lyra went.  The Witch Queen interferes, resulting in the Cardinal being killed.  As a result, a shift in power happens in the ranks of the Magistarium and the new leader has the lands of the Witches bombed.

Lyra and Will go away from the city, stepping through a portal to arrive in Will's world version of Oxford.  She tells him she has learned his secret that he killed someone, but that she understands why he had to do it.  Chased there by the police, the compass is stolen by mrs Coulter's associate.  Lee is looking for answers, and caught by the Magisterium but he can escape, vowing to look for a professor Grumman who can tell more about the Southern Knife.

Will and Lyra see a strange figure now and then in the locked, doorless Tower of Angels in the center of the city.  They find a passage into it though, and learn he is the Knife Bearer, a role that passes on to Will as he needs to protect Lyra.  With the knife, they can open windows into another world.  As Mary, a professor in our Oxford, makes sentient contact with the Dust aka dark matter, she learns that it are actually angels, out for vengeance.

The witches led by Seraphina and Lee, who has made contact with a mysterious Shaman and who is hinted at being Will's father, both break through the blockade the Magisterium has put around the portal to converge in the city and ally with Lyra, who together with Will has retrieved the Golden Compass with a daring plan into our world.

But as their paths start to converge and battle with the Magisterium ensues, some of them fall in the line of faith and duty.  Will is reunited with his father, who was indeed the shaman, but his dad passes on woon afterwards, leaving Will a boy now driven by vengeance.  Mrs Coulter takes Lyra along, while Seraphina finds Lee, who fell holding off the enemy to have Will's dad escape...

And so the series ends this season with a lot of tragedy, now to wait until we get to see the third (and final?) season of the book trilogy, as I really like this series.