Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
The Doctor locks Susan out of the TARDIS
S2E9
·
Flashpoint
To
The Doctor Releases Susan
S2E9
·
Flashpoint
Why These Connect
The narrative assertion
"The Doctor's action of locking Susan out is then followed by his explanation of the reasoning behind it."
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.