Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor forces Rutan to reveal true form
S15E4
·
Horror of Fang Rock Part 4
To
Doctor exposes Rutan war truth
S15E4
·
Horror of Fang Rock Part 4
Why These Connect
The narrative assertion
"The Doctor's confrontation causes the Rutan to drop its human guise, leading directly to the Rutan explaining its mission to use Earth as a strategic base against the Sontarans."
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.