Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor demonstrates time sensor to Jo
S9E21
·
The Time Monster Part 1
To
False detection shifts to dread of another TARDIS
S9E21
·
The Time Monster Part 1
Why These Connect
The narrative assertion
"The Doctor’s explanation that the time sensor detects disturbances in the time field leads Jo and him to realize another TARDIS is nearby, culminating in the discovery of the Master’s temporal machine and its location at Wootton."
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.