Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The RAF’s confirmation of the heat barrier’s impenetrability (Part 3) directly causes the Doctor’s urgent deployment of the heat exchanger (Part 4), as the barrier’s existence makes UNIT’s only possible solution a technical one."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
This connection solidifies the Doctor’s trajectory: from recognizing the barrier’s existence (Part 3) to engineering its breach (Part 4), framing his adaptation to an environment where traditional military solutions fail.
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.