Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor confronts Sarahs blindness at Solons door
S13E18
·
The Brain of Morbius Part 2
To
Doctor decides to seek Solon for help
S13E18
·
The Brain of Morbius Part 2
Why These Connect
The narrative assertion
"The Doctor’s resolve to obtain the Elixir to save Sarah's sight directly triggers Solon’s hidden plan, as Solon exploits the Doctor’s quest to manipulate the Sisterhood."
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.