Yep, Aeryn Pip's work here. She'd mugged Jake's parents and had (after disguising herself as a human) gone to lay low in the poorer district of New York city, only to get herself captured by some mobsters (just ahead of some Low Men).
It was a hectic and destructive affair in places, but the Doctor and Companions were able to rescue Aeryn Pip from captivity. Even not only talk her into joining up with Eternity Inc, but becoming the latest Companion aboard the TARDIS (after this Quest was over).
Yeah, you got it, Aeryn Pip (as well as most of thethe next targets) joined up as Champions for the Rules and Agents.
The next world (an alternate Terra) we had a Frederigo D'Honaire and an Astra Thessamer who'd been changed into demifoxes due to circumstances much like here. Yes, like those other analogs, these demifoxes get stuck forevermore as demifoxes (due to that fruit and the Key Component putting paid to any chances of a "cure"). But unlike those others, these demifoxes find out that their Wallants is nothing but some kind of mockup of a city. A tent city who�s illegal goods gets carted up and hauled away into hiding whenever the law gets on their case. They�d come to grieve, having all but the clothing on their backs stolen and it looked grim until the Champions here met them. Approached them and hired them as native guides. This not only got the demifoxes into the Champions� hands, but this actually did get them a native guide (useful for those tight spots where insight could be useful). That done (the demifox targets collected) the Doctor�s group moved onto the next set.
Turns out that the next (and final) group of immortal Key Carriers had landed on the newly arisen island of Atlantis, where the Atlans had awoken from a long nap (long story). They had been captured by the Atlans who had no idea whether their olden enemies (those who�d put them asleep) were still about.
Now, the Atlans are too powerful to take on by force (well, anything less than a tac nuke).... In the end, it was both LUCK and kindness that had won the day and won the Champion�s (and the Key Carrier�s) freedom. See, the Champions had made a good impression (overall) with Aeryn Pip. When she get�s interrogated, the Quest gets revealed (Dark Tower and all). Now these Atlans have legends about the Dark Tower (and what a BAD idea it is to interfere with Dark Tower business). That and these Atlans (unlike most others we�ve heard about in the story) were good guys at heart (just a bit paranoid, understandably, after everything they�d gone through). Promising to send food supplies to get the Atlans through their tight spot (cattle and other food stock hadn�t come along with the sleeping Atlans....they�d been facing starvation), the Doctor and Companions arrive on Midworld (at the base of the Dark Tower). Their business soon done, the Doctor, Companions, and newly inducted Champions (Thalja, Demifox Fred 2, Demifox Astra 2, & Aeryn Pip.
With Aeryn Pip as his new Companion, they joins with "newbie" Champion Sovay and her mate, Demifox Synizn in the next Validation Quest.
After going back over old ground -- collecting up the Tallyn from the reality of Farscape�s John Crichton of "season 2" since he had somewhere along the line AFTER the Champions had left become a Key Component Carrier -- we find out that this Quest is going back over old business that the John Crichton of Farscape "Season 4" had in both Unrealized Reality and Pray.
Think of it this way. Lots of people had died in those episodes (some even at Crichton�s hands. . . . in a way). Besides collecting the hapless Key Component Carriers throughout those various "unrealized realities" the Champions took it into their heads to save those who they could. Which happens to be more than you�d think because there had been some magical tampering with the Crichton�s memories who�d travelled throughout them (before). Meaning that those who�d appeared to have bought their plot needn�t necessarily have died. They might be savable.
Won�t go into the big details on how things went (sticky and amusing in some points, surprises left and right). But while some loss of life occurred the Champions were successful (and John had some redemption on his soul, as it were).
Next leg of this Quest was a crossover with a Jame�s Bond movie/reality called "Moonraker"....