Object
Master's TARDIS Dematerialisation Circuit
Compact vital TARDIS component, shaped like a metal caltrop, that enables dematerialization for escape from Earth. The Master originally stole it by ripping it from murdered Farrel's body, but it later comes into the Doctor's possession. Major Cosworth delivers it to the Doctor inside the Brigadier's mobile office (via an envelope) as the final piece needed for the Master's TARDIS escape. The Doctor examines it closely, and both he and the Brigadier recognize its role in completing the Master's repairs. UNIT personnel stand by as the handover confirms the Master's impending escape, shifting the room's tension. The circuit is also brandished by the Doctor as leverage in standoffs with the Master, exposing the Master's vulnerability and catalyzing plot shifts.
12 appearances
Purpose
Enable TARDIS dematerialization for interstellar travel and escape from Earth
Significance
Doctor wields it as tactical leverage and bargaining chip against the Master, trading for missile deactivation and retreat to save London. Exposes Master's vulnerability, pivots conflicts from aggression to tense deals, and catalyzes plot shifts including Keller Machine exploitation.
Appearances in the Narrative
When this object appears and how it's used