Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor deduces Sontaran involvement in Harry's disappearance
S12E9
·
The Sontaran Experiment Part 1
To
Doctor uncovers alien tracks Roth unravels
S12E9
·
The Sontaran Experiment Part 1
Why These Connect
The narrative assertion
"The Doctor and Sarah suspecting the alien machine's involvement in Harry's disappearance (beat_d5dc53dbe31cee7c) leads directly to the Doctor analyzing Terullian drive tracks (beat_06c20eaad360e569), identifying Sontaran tech."
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.