 Unknown to the delegates, Captain Indigo, a Spectrum officer working undercover as the lodge's waiter, is murdered by Captain Black and reconstructed in the service of the Mysterons.When the Mysteron Detector reveals his true nature, Indigo's reconstruction sabotages the conference by activating the controls that cause the lodge to descend into the ground.He then escapes in a car with the key to the controls, leaving the delegates to be crushed by the building above them.