Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Thals spotted in Dalek ambush zone
S1E8
·
The Ambush
To
Thals spotted in Dalek trap
S1E8
·
The Ambush
Why These Connect
The narrative assertion
"The group discovering the Thals leads to the Doctor realizing the Daleks' plan to ambush them, setting up the central conflict of the back half."
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.