I thought this was a great episode. Probably the best one of the entire season thus far. It's actually a good place to take a break, ending not on a cliffhanger, but telling a complete character and plot arc for the show to date.
This episode was basically from the POV of Gwyn, and it worked in spades. Essentially there was this tension within Gwyn's character between loyalty to her father and her sense of right and wrong/affection for the other characters. She started the episode as a betrayer of the remainder of the kids, had a complete and total breakdown of her idolization of her dad, and made a reverse heel turn into a full comrade-in-arms with the escapees. Dal gets a bit of a character arc as well, but it's secondary to Gwyn's lead here - but important that he goes over the course of the episode from the character who trusts her least to the character willing to risk everything to save her life. Simultaneous to the completion of these character arcs, the kids discover the true nature of the ship, which is a nice metaphor for "leveling up" as a crew.
The episode gets dinged in my book for one reason alone - the idea of a ship powered by a "protostar" is dumb, even in the history of Treknobabble. Protostars are not small, they are actually much larger than regular stars due to being lower density. I simply cannot completely look past this, even though I enjoyed the episode considerably.
