Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor’s desperate plea for entry
S6E28
·
The Seeds of Death Part 6
To
Doctor warns of Ice Warrior threat after rescue
S6E28
·
The Seeds of Death Part 6
Why These Connect
The narrative assertion
"The Doctor's plea to open the door leads directly to Zoe opening it, resulting in foam entering and them retreating."
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.