Object
Doctor's Radiation Counter
A specialized scientific instrument used exclusively for measuring radiation levels in external environments. The Doctor employs this device to assess planetary safety, often in the presence of his companions (Barbara, Susan, and Ian). It plays a critical role in the Doctor's assessments, though its readings are occasionally questioned by his companions (e.g., Ian's skepticism in An Unearthly Child). The device is portable and used both inside and outside the TARDIS, with readings influencing the group's decisions about venturing into new environments.
10 appearances
Purpose
Detect and measure radioactivity levels in enclosed spaces like the saucer's power unit column
Significance
Confirms the Dominators extract Dulkis's core for fuel, revealing operational inconsistencies and arming the Doctor with knowledge to counter their invasion; Zoe's probing questions amplify its plot pivot from survival to subversion
Appearances in the Narrative
When this object appears and how it's used