Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and Romana unlock Nimon's gateway plan
S17E19
·
The Horns of Nimon Part 3
To
Doctor uncovers Nimon invasion via hyperspace
S17E19
·
The Horns of Nimon Part 3
Why These Connect
The narrative assertion
"The Doctor and Romana analyzing the Nimon's energy beam and direction beam leads them to realize it's focused on a black hole and could create a hyperspace gateway, which is confirmed when two more Nimons arrive, revealing the full invasion plan."
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.