Salt-Based Controlled Implosion Device

The Doctor's team employs a desperate countermeasure using salt pouches arranged in a precise geometric pattern around the Fendahl skull. Colby's lead-lined box contains the triggering mechanism, designed to create a contained detonation that collapses the skull's energy field. Martha's trolley of salt pouches forms the defensive barrier, while the Doctor orchestrates the sequence under extreme duress. The implosion generates a visible pulse of light as the entity's power is forcibly inverted.