Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor abandons Gallifrey for Earth detour
S18E25
·
Logopolis Part 1
To
Doctor diagnoses TARDIS entropy strain
S18E25
·
Logopolis Part 1
Why These Connect
The narrative assertion
"The Doctor's anxiety about Romana's actions on Gallifrey (which have led to a change in Time Lords' perception of him) directly drives his decision to avoid Gallifrey and stop on Earth instead. This causal chain establishes the Doctor's strategic shift in travel plans."
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.