PK Tech Girl - S1-E5
Visible crew/equipment: Aboard the Zelbinion, when Aeryn and John question Gilina about how the Zelbinion died, after Gilina says, "Officer Sun, I think you should know, I consider you a traitor...," when it cuts to Rygel in his hoverchair with his flashlight in hand, there's puppeteer movement behind him. Later, after Zhaan tells Rygel to find Durka's corpse because it'll set him free, when Rygel's back aboard the Zelbinion, although he's just remembering being in a cage in front of Durka, it's interesting to note that we can see the puppeteer's movement behind Rygel.
Chosen answer: It's never explained. John mentions a theory that his less technologically developed craft simply interferes with the wormhole less than the "superior" Vipers, but they never make a concrete determination on that point. But we also have to take into account the fact that Moya traverses wormholes with no ill effect as well.
Garlonuss ★