Object
Millenius Vault Micro-Key
A tiny, stolen microcircuit and component of the Keys of Marinus, central to the conspiracy. Its theft triggers the framing of Ian Chesterton, while its recovery clears his name and advances the quest to free the TARDIS. Physically distinct from the glass case; hidden in a mace, then entrusted to Ian.
15 appearances
Purpose
Component of the Keys of Marinus; retrieval from Millenius vault advances the quest to secure TARDIS release from Arbitan.
Significance
Macguffin driving the conspiracy: its theft frames Ian, Kala's coerced confession implicates him further, but recovery exposes Eyesen, clears Ian's name, restores companions' trust, and pivots narrative toward confronting Yartek.
Appearances in the Narrative
When this object appears and how it's used