She could have gone Cluster Lizard and taken out the guards and escaped from P4X. But for some reason, she didn't. Perhaps she wanted to explore the jail and see what was in store for her there?

I missed episode 2 by the way, "Texx Lexx" it was called.

Those Psycho Carrot robots or whatever they are, are not Mantrid's arms, but something like them. I got a feeling we will meet yet another villian.

The boy, Digby, may be the reincarnation of Thodin, Duke, or Fifi. I am not sure which, but he sure seems to not be just a boy. I think Prince knew this, and that is why he captured the boy instead of just killing him. He may have had a use for the boy, or maybe wanted to make the boy suffer?