Object
Keller Machine Control Collar
Energy-based restraint collar used by UNIT to contain the Keller Machine’s psychic emissions in Stangmoor Prison. Distinct from other control devices in Doctor Who by its role in containment and catastrophic failure, triggering a narrative crisis involving the Master and UNIT’s military response.
2 appearances
Purpose
Contains and restrains the Keller Machine to prevent its escape and uncontrolled psychic emissions.
Significance
Burns out catastrophically, allowing the Keller Machine to break free and heighten prison-wide panic, pitting UNIT's military response against the Doctor's push to destroy it amid the Master's nerve gas scheme.
Appearances in the Narrative
When this object appears and how it's used