Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Chumbley sacrifice secures TARDIS escape
S3E4
·
The Exploding Planet
To
Doctor tends to Vicki’s injury
S3E4
·
The Exploding Planet
Why These Connect
The narrative assertion
"Steven throwing the power cable out is the thing that allows the TARDIS to leave and fully escape the exploding planet."
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.