Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Jamie’s remark sparks solvent solution
S4E25
·
The Moonbase Part 3
To
Polly and Ben develop the solvent weapon
S4E25
·
The Moonbase Part 3
Why These Connect
The narrative assertion
"Polly and Ben's discussion about how to defeat the Cybermen leads to Polly testing acetone and discovering it dissolves plastic, giving them a weapon."
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.