Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and Leela confront unfolding catastrophe
S15E9
·
Image of the Fendahl Part 1
To
Doctor realizes Earth is the scan source
S15E9
·
Image of the Fendahl Part 1
Why These Connect
The narrative assertion
"The decision to trace the anomaly to its origin (beat_0a77ef8a7bb21b2a) results directly in the Doctor's revelation that the source is Earth (beat_59c70706ef3a61cb), establishing the setting for the remainder of the story."
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.