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Object
Object

Tricophenyladehyde Reservoir in Hypodermic Needle

The Doctor examines a residue of viscous, amber-colored Tricophenyladehyde within Spandrell’s hypodermic needle—a substance the Doctor identifies by scent alone. No larger sample exists in this scene; the poison lingers only as a trace, yet its revelation exposes the Master’s enduring deception. The needle itself appears unremarkable, but the confirmatory nature of the test speaks to Gallifreyan forensic precision.
2 appearances

Appearances in the Narrative

When this object appears and how it's used

2 moments
S14E12 · The Deadly Assassin Part 4
Doctor learns Eye of Harmony secrets

Tricophenyladehyde residue is identified by the Doctor within the hypodermic needle, confirming the poison’s use as a neural inhibitor. The forensic detail reveals the Master’s surgical precision, proving his staged death was calculated to manipulate the Time Lords into a false sense of security.

Before: Trace residue within a sealed hypodermic
After: Examined and identified by the Doctor
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S14E12 · The Deadly Assassin Part 4
Doctor uncovers Masters survival ruse

Trace amounts of viscous amber-colored tricophenyladehyde within the hypodermic needle are identified by scent by the Doctor, confirming the Master’s self-induced poisoning during his staged death. Though no longer a physical threat, this residue serves as forensic proof of the deception, enabling the Doctor to expose the elaborate lie and recalibrate the mission against the Master’s ongoing manipulations.

Before: Residue hidden in the hypodermic, discovered upon forensic examination
After: Confirmed as a neural inhibitor trace; forensic evidence of the Master’s deception
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