Object
Professor Travers' Yeti Control Sphere
A complete, fist-sized glowing metal sphere—distinct from internal components like the Control Sphere Collector—used to command Yeti robots via radio signals. This is the primary control device, not a sub-component, and is held, tested, and reprogrammed as a standalone unit.
26 appearances
Purpose
Enables Great Intelligence to control Yeti robots and weaponize Professor Travers' research for London infrastructure takeover
Significance
Serves as key artifact and strategic objective; its implied theft via Travers' abduction escalates crisis from lab break-in to city-wide threat, with Doctor's insight shifting focus to rescue and sabotage
Appearances in the Narrative
When this object appears and how it's used