Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and Jamie discover deep-space radio
S6E13
·
The Invasion Part 3
To
Vaughn orders covert surveillance of the Doctor
S6E13
·
The Invasion Part 3
Why These Connect
The narrative assertion
"The Doctor's observation of the deep space radio communication system motivates Vaughn to monitor the Doctor's conversation."
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.