
Visible crew/equipment: After Crais "humbly" accepts Talyn's offer of the Hand of Friendship, just as the metal tentacle rises up from below the floor before the neural transponder is embedded in Crais, we can see a crew member's hand holding the tentacle at the bottom of the screen.
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 ★