Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
The Doctor shifts from water to telephone
S2E3
·
Crisis
To
Failed Call and Barbara’s Collapse
S2E3
·
Crisis
Why These Connect
The narrative assertion
"The Doctor proposes to contact the outside world for assistance. This leads to an attempt to use the telephone. The attempt fails, leaving them defeated."
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.