Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor signs Vardan control accord
S15E21
·
The Invasion of Time Part 1
To
TARDIS lands as Gallifreyan tensions rise
S15E21
·
The Invasion of Time Part 1
Why These Connect
The narrative assertion
"The Doctor's signing of the Vardan document catalyzes the Vardans' ability to observe and respond to his arrival on Gallifrey, allowing them to monitor the TARDIS's materialization and plan their next move accordingly."
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.