Object
Master’s Medical Stethoscope
A stethoscope used by the Master to monitor the Doctor’s vitals post-Keller Machine trauma, confirming the failure of his second heart.
1 appearances
Purpose
Detect heartbeats and monitor vital signs
Significance
Confirms the Doctor's failing dual-heart physiology, sparking the Master's desperate manual revival attempt and exposing his pragmatic reliance on keeping his rival alive for future schemes.
Appearances in the Narrative
When this object appears and how it's used