Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor pledges to elixir quest for Sarah’s sight
S13E18
·
The Brain of Morbius Part 2
To
Solon gives grim diagnosis and risky lifeline
S13E18
·
The Brain of Morbius Part 2
Why These Connect
The narrative assertion
"Solon’s grim verdict on Sarah’s blindness directly prompts the Doctor to risk everything for the Elixir, creating a moral and narrative turning point in his characterization."
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.