Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Ian and the Doctor’s successful retrieval of the TARDIS key in Episode 18 leads directly to the confrontation in Episode 19 where Marco tests Ian’s honesty using the key, revealing the stolen nature of their access."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
This links the key’s retrieval to the immediate consequences in Episode 19, forming a causal chain of deception and interrogation that defines their relationship with Marco Polo.
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.