Relativity - S3-E10
Visible crew/equipment: When Stark and Aeryn are back aboard Talyn with Xhalax, who is tied up, when Stark says, "As far as I can tell, Talyn's systems are almost back to normal," we can see the puppeteer's face (wearing a weird black mask) and hands under Rygel's hoverchair.
Relativity - S3-E10
Visible crew/equipment: When they are suggesting decoys to lure the Retrieval Squad, Stark questions the idea and Crichton says "Stark, if you have any other ideas we'll be thrilled to hear them before we go out". At the same time they are walking down a passage way with the camera following. As they turn the corner the camera's shadow can be seen on the wall to the left.
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 ★