Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor’s negotiation of Borusa’s confinement during the Vardan occupation (Part 3) creates the political vacuum in which the Sontarans later exploit the Great Key crisis (Part 5), forcing Borusa and the Doctor into a tense alliance."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
The Doctor’s earlier political maneuvering leads directly to the Sontaran invasion in Part 5, where the absence of strong leadership (Borusa’s weakened state) and the Doctor’s absent scheming create conditions for the current conflict, propelling Borusa into action.
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.