A flaming 1000-feet inferno at a deliberately impaired oil-drilling rig, Rig Number 15, attracts the attention of Spectrum when the Mysterons explain their new threat to ""immobilize"" the international-security organisation, which would render all their aerial, sea and land vehicles from there daily used purposes.

With the ultra-sonic oil wells or Spectrum's main oil refinery at Bensheba, not so far from Rig 15, as possible & potential targets, explosive specialist Jason Smith, is hired to extinguish the fire with his vast range of high explosive charges.

Approaching the blazing rubble, Smith falls down in front of his tractor, and is reconstructed by the Mysterons when the tractor is forced forwards, burying the real Smith under the debris, but extinguishing the fire.

The next day, the doppelganger Smith departs early from the site, leaving his original body near the downed rig, alerting Captain Scarlet that the Mysteron is on his way to the Bensheba oil refinery to annihilate it's ent