Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Skeletons of a lost civilization uncovered
S17E1
·
Destiny of the Daleks Part 1
To
Discovery of the Kantran corpse
S17E1
·
Destiny of the Daleks Part 1
Why These Connect
The narrative assertion
"The discovery of manufactured concrete ('a piece of manufactured concrete') directly leads to the Doctor later identifying the corpse as a pilot from a technologically advanced world (Kantra), reinforcing the theme of fallen civilizations on Skaro and the contrast between its current desolation and past sophistication."
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.