Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor and Nyssa's horror at Hayter's fatal absorption into the Xeraphin (foreshadowing the Xeraphin's power) directly leads to their realization of the Master's invincibility in Part 4, as they now witness the tangible, catastrophic consequences of the Xeraphin's influence."
inferred by llm_cross_episode_arc
Why This Matters Across Episodes
The longer arc this connection carries
This connection carries forward the psychological and identity crisis affecting the companions—Nyssa and Tegan—who are forced to confront the destructive potential of the Xeraphin's mental power. Hayter's absorption is the first visible manifestation of that power, which the Master later exploits and which the Doctor and Nyssa must address in increasingly desperate terms.
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.