While Crichton inspects a wormhole, a small ship emerges and collides with Moya. When the two crews recover, they find that the two ships have fused together in a freakish amalgam, and Crichton wakes up face to face with two aliens armed with needle-shooting gills. However, there is little time to exchange pleasantries. The fused ships are trapped in a series of wormholes, looping repeatedly and Moya seems to be reacting badly to the collision, her systems dying section by section. It is discovered that to separate the ships, one of them must be cast into the wormhole wall and destroyed. The intruders insist that because Moya is on death's door, it is Their ship that must be saved, with both crews on board.
