Great Key

A locking device the Doctor employs to seal the TARDIS systems, rendering the Sontarans' seizure futile. The Sontarans dismiss the console room as 'obsolete rubbish' until Stor realizes the Doctor has trapped them, his momentary triumph turning to fury as he recognizes their vulnerability. The device’s activation immediately curtails Kelner’s forced attempts to restore systems and transforms the invaded space into a prison.

1 appearances

Appearances in the Narrative

When this object appears and how it's used

1 moments

S15E26 · The Invasion of Time Part 6

Sontarans seize TARDIS console room

The locking device seals the TARDIS systems from external control, a defensive gambit implemented by the Doctor. Reported by a Sontaran soldier, this device shifts the tactical balance entirely. Stor interprets the trap as proof of the Doctor's containment, transforming the console room into a baited cage rather than a military target.

Before: Recently activated by the Doctor, locking the Sontarans out of systems

After: Continues to function, effectively trapping Sontaran forces inside TARDIS

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