Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Leela uncovers Doctor's immobilizer trap
S15E21
·
The Invasion of Time Part 1
To
Doctor silences Leela through K9
S15E21
·
The Invasion of Time Part 1
Why These Connect
The narrative assertion
"The Doctor's immobilization of the TARDIS scanner mechanism (to prevent Leela from interfering) leads directly to Leela's growing frustration and distrust, which manifests in her interrogation of the Doctor about his whereabouts and actions."
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.