Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Chen's ultimatum to the Doctor in Episode 19 (using Steven and Sara as hostages to demand the Taranium Core) directly leads to his triumphant return to the Dalek Control Centre in Episode 20 with the core in hand."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
Chen's success in Episode 20 is a direct consequence of his earlier strategy in Episode 19. The hostage situation and ultimatum are the immediate cause of the Doctor's compliance, which allows Chen to retrieve the core.
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.