Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Tegana’s manipulation of Polo against the Doctor (Episode 17) leads to Polo’s heightened secrecy and subsequent hiding of the keys (Episode 18)."
inferred by llm_cross_episode_arc
Why This Matters Across Episodes
The longer arc this connection carries
Tegana’s manipulation of Polo creates a climate of paranoia and distrust, which directly causes Polo to act preemptively to secure the TARDIS. This escalates the conflict between Tegana and the Doctor’s group, ties into Susan’s struggle against external manipulation, and reinforces the theme of deception.
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.