Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Brigadier sends Sarah and Harry to Forgill Castle
S13E4
·
Terror of the Zygons Part 4
To
Doctor confirms Zygon plot at wreckage
S13E4
·
Terror of the Zygons Part 4
Why These Connect
The narrative assertion
"The Brigadier’s decision to drop Sarah and Harry at Forgill Castle to search for clues leads to their delayed arrival at the quarry, where they reunite with the Doctor after the Zygon spaceship is destroyed and the Skarasen threat remains."
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.