Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Trenchard enforces the Doctor's arrest
S9E11
·
The Sea Devils Part 3
To
Master reveals his reptilian plot to the Doctor
S9E11
·
The Sea Devils Part 3
Why These Connect
The narrative assertion
"The Master's orchestration of the Doctor's arrest (via Trenchard) directly leads to the Doctor being imprisoned in the Master's cell, where the latter reveals his true plan to contact the reptilian race."
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.