Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Leela questions urgency of Time Lord summons
S15E25
·
The Invasion of Time Part 5
To
Great Key handover in burning office
S15E25
·
The Invasion of Time Part 5
Why These Connect
The narrative assertion
"The Doctor's urgency to reach the President's Office ('I've got an urgent appointment there') (Act 1) leads directly to his use of the TARDIS as an escape route through Borusa's office (Act 2)."
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.