Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Ian’s Fake Key Exposes Catastrophic Trap
S1E26
·
The Keys of Marinus
To
Ian’s deception and the fake key’s danger
S1E26
·
The Keys of Marinus
Why These Connect
The narrative assertion
"After giving Yartek the fake key, and realizing it's the wrong man, the Doctor demands the key be destroyed, only to find out Ian gave Yartek a fake key. Altos then reveals what putting the fake key into the machine actually does."
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.