Object
Dalek Vibration Locator
Daleks in the control room monitor the vibration locator, which picks up tremors from Thal forces breaching the city walls. It records their advance inside the structure, emitting signals that alert other units and cut short the Doctor's TARDIS negotiation. Dalek 1 and Dalek 2 respond without pause, while Susan grows anxious and the Doctor presses his gambit amid rising peril.
3 appearances
Purpose
Detect vibrations from intruders entering the Dalek city
Significance
Interrupts high-stakes talks with the Doctor, redirects Dalek attention to Thal attack, and accelerates the convergence of escape, radiation, and invasion threats
Appearances in the Narrative
When this object appears and how it's used