Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor manipulates Susan’s distraction to lock the TARDIS
S2E9
·
Flashpoint
To
The Doctor locks Susan out of the TARDIS
S2E9
·
Flashpoint
Why These Connect
The narrative assertion
"The Doctor's distraction and feigned concern over Susan's shoe is directly followed by the Doctor locking the TARDIS. The conversation was the Doctor's means of getting Susan away from everyone else to lock the doors."
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.