Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor resolves to reclaim the perilous tome
S17E21
·
Shada Part 1
To
Dangerous book revealed in Chronotis study
S17E21
·
Shada Part 1
Why These Connect
The narrative assertion
"Chronotis revealing that he took the book from the Panopticon Archives directly leads to the Doctor's expression of concern over its potential dangers, as the revelation of the book's origin and Chronotis' actions justify the Doctor's urgency to secure it."
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.