Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Yartek weaponizes Altos and Sabetha’s bond
S1E26
·
The Keys of Marinus
To
The Doctor entrusts Ian with the key
S1E26
·
The Keys of Marinus
Why These Connect
The narrative assertion
"Altos revealing that the Doctor has the key motivates the companions to split up to find Altos, Sabetha, and Arbitan, directly influencing their strategy."
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.