Object
TARDIS Time Vector Generator Mercury Fuel
Critical liquid mercury fuel for the TARDIS's time vector generator, distinct from external mercury sources. Its depletion in The Wheel in Space (Parts 1 and 4) strands the TARDIS, necessitating the Doctor's later acquisition of an alternative mercury source (the 'Doctor's Bottle of Mercury') for sabotage purposes.
3 appearances
Purpose
Refill the TARDIS time vector generator to restore functionality and enable departure
Significance
Blocks TARDIS operation amid escalating Cybermen crisis; Jamie ties crew survival to finding it, amplifying desperation in crewless rocket and base-wide panic
Appearances in the Narrative
When this object appears and how it's used