Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Blade completes Polly’s alien replacement
S4E31
·
The Faceless Ones Part 1
To
Polly denies recognizing the Doctor
S4E31
·
The Faceless Ones Part 1
Why These Connect
The narrative assertion
"The alien replacement process ensures that the duplicate Polly is able to fool them."
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.