Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor reveals Forgill as Zygon
S13E3
·
Terror of the Zygons Part 3
To
Discovery of Zygon spaceship and Duke's betrayal
S13E3
·
Terror of the Zygons Part 3
Why These Connect
The narrative assertion
"The Doctor’s suspicion that Duke Forgill is a Zygon imposter prompts immediate concern for Sarah’s safety, leading to consequences when she is later discovered missing and potentially in danger."
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.