Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and Romana uncover Nimon weapon secrets
S17E19
·
The Horns of Nimon Part 3
To
Doctor summons K9 to analyze Nimon device
S17E19
·
The Horns of Nimon Part 3
Why These Connect
The narrative assertion
"The Doctor and Romana deducing the complex's function as a giant positronic circuit prompts the Doctor to decide to use K9 to uncover the secrets of the Nimon's lair, especially the transmitter's purpose."
About Causal Connections
A directly causes B. The first event sets forces in motion that produce the second. These are the load-bearing connections of plot--remove one and the story structure collapses.