Fabula
Object
Object

Dynatrope Exit Shaft Photoelectric Cell (Kroton Security Mechanism)

Kroton-manufactured photoelectric cell in the Dynatrope exit shaft, sabotaged to trap the Doctor; restored using the Doctor’s mica specimen (separate entity) as a conductive bypass, triggering a poison jet.
1 appearances

Purpose

Detects interruptions to control shaft door access and trigger security responses

Significance

Confirms the Krotons' intentional sabotage, exposes their lethal containment strategy, and underscores the Doctor's ingenuity in bypassing it—though it unleashes the next deadly trap, heightening the escape's risks

Appearances in the Narrative

When this object appears and how it's used

1 moments
S6E20 · The Krotons Part 2
Doctor bypasses Kroton trap with mica

The photoelectric cell is the key to escaping the Dynatrope exit shaft, but it has been deliberately sabotaged by the Krotons to trap the Doctor and Zoe. Its malfunctioning state is discovered by Zoe, who realizes the circuit has been cut. The Doctor exploits its broken nature by using a piece of mica to bridge the gap, thereby activating the door mechanism. The cell's failure is a direct manifestation of the Krotons' control over the environment, and its repair—however temporary—highlights the Doctor's ability to turn their own technology against them.

Before: Malfunctioning and inert, with its circuit deliberately severed by the Krotons to prevent the door from opening.
After: Temporarily functional as the Doctor uses the mica to bridge the gap, allowing the door to open before the poison jet activates.
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