The Enterprise had been remotely hijacked by the Robots, who landed the ship on their planet and demanded the crew disembark. Once off the ship the Robots stunned the crew and loaded them onto transporters to take them to another location in their settlement. Fortunately the transporter holding the bridge crew spontaneously exploded as it travelled through the city. The forcefield that had been preventing the crew from escaping remained in place long enough to protect them from the explosion, before collapsing to allow their escape from the wrecked vehicle.