Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Sondergaard's revelation of her true identity and her hidden laboratory in Episode 18 directly enables her later plea for the Doctor to leave her behind in Episode 19, as the Doctor knows to trust her expertise and go to Skybase."
inferred by llm_cross_episode_arc
Why This Matters Across Episodes
The longer arc this connection carries
This connection carries the narrative thread of Sondergaard's terminal condition and her drive to complete her work. Her self-sacrifice in Episode 19 is foreshadowed by her vulnerability and scientific dedication in Episode 18.
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.