Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Zoe’s mathematical determination to track the TARDIS’s trajectory (Part 3) sets up the Doctor’s logical approach to detecting the audio lock via scanning the mine walls (Part 4), where geometry and physics enable escape."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
This connection demonstrates a continuity in the Doctor’s reliance on science and his companions’ analytical skills across the episode boundary: Zoe’s trajectory calculation enables the Doctor’s discovery of a hidden mechanism, tying together science and problem-solving in a coherent arc.
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.