Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor and companions arrive on ruined Earth
S12E9
·
The Sontaran Experiment Part 1
To
Doctor falls into subsidence as Sontaran threat rises
S12E9
·
The Sontaran Experiment Part 1
Why These Connect
The narrative assertion
"The initial transmat malfunction (beat_fc83e8c7311ce23b) leads to the Doctor's prolonged presence on Earth, culminating in his fall into the subsidence while investigating Harry's disappearance (beat_d4ce221d9bc4583d). The transmat's failure directly chains into the Doctor's continued danger."
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.