Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The revelation that the Krynoid was once Keeler (Sarah's discovery in Part 5) directly informs the Doctor's later suspicion that Chase is 'actively possessed' by the Krynoid. This establishes a thematic and logical chain: human transformation into instrument of the alien threat."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
The Doctor's deduction about Chase's infection is built on the precedent set in Part 5 where Keeler's identity was erased by the Krynoid. The thematic continuity of 'former person becomes monster' drives the Doctor’s investigative arc across episodes.
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.