Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Ventilation shaft revealed in barrack wall
S21E4
·
Warriors of the Deep Part 4
To
Turlough scavenges as vigil begins
S21E4
·
Warriors of the Deep Part 4
Why These Connect
The narrative assertion
"Turlough and Bulic’s discovery of the ventilation shaft in the barrack’s bulkhead sets up its later use by Tegan, enabling the companions to regroup, plan, and eventually aid the Doctor."
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.