Turns out not only children are going through the treatment.

Lyra plots escape at every moment using a convenient fire alarm to make the first attempt.

Once Roger discovers an empty cage marked with Billys name, Lyra admits their Gyptian friend died.

His Dark Materials

Alex Bailey/HBO

As for the progress of the Gyptians, its slow going since the terrain is mountainous and difficult.

Its not the only scene set outside Bolvangar as we make a quick stop off with Will.

She requests a demonstration, not knowing Lyra is there and is the next up to be severed.

His Dark Materials

Alex Bailey/HBO

Terrified, she and Pan are locked into the separate cages.

and Coulter frantically rushes to stop the process.

Lyra has prepared for this moment and surrenders a tin that has been soldered shut.

His Dark Materials

Alex Bailey/HBO

Once Coulter pries it open, shes attacked by the spy fly she sent after Lyra in episode 3.

Pan brings Lyra back to her senses and she sets off the fire alarm.

The time to escape is now or never.

Ma Costa faces off against Dr. Rendal and gets personal payback for Billys death by snapping his neck.

Another Tartar almost ambushes them until Lee takes them out with a clear shot.

The episode takes a slightly odd turn once the Gyptians win the battle.

Lyra wishes her goodbye and boards Lees balloon along with Iorek and Roger to rescue her father.

But if Lee is now in charge of Lyras safety, he doesnt maintain it for long.

As Serafina takes off and his balloon moves north, it comes under attack by cliff-ghasts.

Lets hope she finds a soft landing.