Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Merdeen's grief over Grell's death (a direct consequence of Drathro's oppressive regime) solidifies Merdeen's disillusionment and sows the seeds for the Doctor's later resolve to confront Drathro directly. This emotional weight fuels the Doctor's determination to act, culminating in his decision to enter Drathro's castle alone to prevent further catastrophe."
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.