Object
Tobias Vaughn's Cybermen Navigation Beacon (Destroyed by Brigadier)
The Doctor identifies this radio beam transmitter at the International Electromatics compound as the device guiding Cybermen to deliver their invasion bomb. Vaughn confirms its location under pressure, marking it as the primary sabotage target. The Brigadier later destroys it inside the Cybermen's factory compound control room from aboard a UNIT airplane, neutralizing the device and preventing remote detonation of the doomsday bomb. Though the Cybermen's spaceship persists with hypnotic signals, this strike delivers UNIT's first major blow against the invasion.
9 appearances
Purpose
Projects radio beam to guide Cyberman invasion fleet and bomb to Earth
Significance
Serves as the linchpin of Cybermen invasion; disabling it offers UNIT's sole chance to halt global annihilation, forcing Vaughn's conflicted cooperation and exposing his pivotal role between betrayal and redemption
Appearances in the Narrative
When this object appears and how it's used