Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The TARDIS breakdown (requiring mercury) forces the group to enter the radioactive city, leading directly to their radiation exposure and detection by the Daleks."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
This links the pragmatic consequence of the Doctor's scientific curiosity (the secret trip to the city) to the catastrophic outcome of radiation sickness. It shows how Susan’s grandfather’s actions create systemic peril, driving the plot from technical failure to external threat.
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.