Thank God It's Friday... Again - S1-E6
Visible crew/equipment: After Aeryn extracts the worm from John's abdomen, when Rygel says, "If I were warmer, I would have an appropriately venomous reply. Be warned, I owe you one," he drops down off the table, and as Rygel waddles away the boom mic dips into view at the top right side of the screen.
Thank God It's Friday... Again - S1-E6
Other mistake: The planet population works in the fields, harvesting large brown biconal fruit. They seem to be heavy, as a bag containing about three of them is a burden to the person carrying it. When the leader of the planet shows one to Crighton, she picks one up with three fingers.
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 ★