Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Sergeant Leigh is initially lured away from his post by Ace in Part 3 (enabling the Doctor's plan), then reappears in Part 4 gravely compromised (dying after encountering haemovores), showing a direct consequence of his earlier serive."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
This connection traces Sergeant Leigh's arc from being a competent authority figure distracted by Ace to becoming a victim of the haemovores, illustrating the escalation of the Fenric threat and its toll on human order. His failure to maintain his post leads to his downfall.
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.