Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Tegan's defiance of Mawdryn's authority in Part 3 (insisting on joining the mission) leads to her exposure to the temporal contamination that causes the aging crisis in Part 4. Her presence in the lab and trust in the Doctor's guidance indirectly enables the mutation's spread."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
Tegan's early willingness to challenge authority (even alien forms claiming to be the Doctor) sets her on a path where she directly participates in events leading to contamination. This causal chain shows how her character's agency, while initially protective, inadvertently contributes to the crisis.
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.