Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Discovery leads to explosive excavation
S26E2
·
Battlefield Part 2
To
Doctor and Ace descend hidden tunnel
S26E2
·
Battlefield Part 2
Why These Connect
The narrative assertion
"Ace’s failed but successful (in outcome) explosion at the dig site reveals the hidden tunnel, directly advancing the plot toward the Merlin/spacecraft discovery and setting up the confrontation with Morgaine."
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.