Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor defies Polo to seek Cave
S1E16
·
Five Hundred Eyes
To
Doctor learns cave location from spy
S1E16
·
Five Hundred Eyes
Why These Connect
The narrative assertion
"Susan and Ping-Cho's theory about Barbara's location prompts the Doctor to seek information from Chenchu."
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.