Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
TARDIS Buried Under Collapsing Bridge
S2E4
·
World's End
To
Barbara and Susan confront temporal displacement
S2E4
·
World's End
Why These Connect
The narrative assertion
"The Doctor and Ian's departure from Barbara and Susan leads directly to Barbara's growing unease and realization that they are not in their own time due to the unnerving quietness and strange poster she sees."
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.