Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor deduces astronauts remain in orbit
S7E14
·
The Ambassadors of Death Part 3
To
The Doctor Reveals the Alien Conspiracy
S7E14
·
The Ambassadors of Death Part 3
Why These Connect
The narrative assertion
"Because Liz points out that radiation destroys human tissue, the Doctor deduces the astronauts are not in the building but in orbit, because whatever is in the building now clearly isn't human."
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.