Causal
medium strength
Narrative Connection
How these two moments in the story relate
From
Doctor discovers escape path as vault collapses
S14E12
·
The Deadly Assassin Part 4
To
Spandrell leads escape from vault
S14E12
·
The Deadly Assassin Part 4
Why These Connect
The narrative assertion
"The recognition that they are trapped in the vault and the discovery of the service shaft leads Spandrell to direct the Doctor and Engin toward it, initiating their escape plan. This moment shows the fruit of earlier curiosity (the Doctor’s request to investigate beneath the Records Room) as practical salvation."
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.