Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor mirrors Susan’s collapse
S1E12
·
The Edge of Destruction
To
Susan’s violent breakdown and Barbara’s confrontation
S1E12
·
The Edge of Destruction
Why These Connect
The narrative assertion
"Susan's unconscious state leads to Ian's attempt to help her, but she responds violently, grabbing scissors and attacking him, showing the escalating effect of the TARDIS malfunction."
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.