Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and Romana encounterRollright mysteries
S16E9
·
The Stones of Blood Part 1
To
Doctor uncovers blood at stone circle
S16E9
·
The Stones of Blood Part 1
Why These Connect
The narrative assertion
"Professor Rumford recognizing the Doctor from a past symposium leads to her discussing discrepancies in the number of stones, which the Doctor connects to the recent movements indicated by the indentations."
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.