Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Arbitan blackmails the crew by locking the TARDIS, rendering them captive and dependent, which directly results in their forced participation in retrieving the keys—keys that Yartek later misuses."
inferred by llm_cross_episode_arc
Why This Matters Across Episodes
The longer arc this connection carries
The loss of the crew’s agency (TARDIS locked) becomes the catalyst for the entire key-recovery quest, whose fallout allows Yartek to hijack the system. The chains Arbitan places become the chains Marinus suffers under Yartek.
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.