Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor's earlier decision to send Ian to find Barbara in the Crater of Needles directly drives Barbara's presence and immediate peril in Episode 19. His mission sets the stage for Barbara's captivity and her interactions with Hrostar."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
The Doctor's explicit plan to locate Barbara in the Crater of Needles (Episode 18) is the causal foundation for Barbara's entrapment and subsequent discoveries in the same location (Episode 19). This thread solidifies the mission's stakes and character agency.
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.