Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor learns Global Chemicals chain of command
S10E24
·
The Green Death Part 4
To
Doctor prepares for Global Chemicals infiltration
S10E24
·
The Green Death Part 4
Why These Connect
The narrative assertion
"Yates's revelation about the director-keyed lift containing the formula (source) directly motivates the Doctor's infiltration and use of the sonic screwdriver (target), advancing the plot toward a solution."
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.