Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor's departure (with Romana) from St Cedd's College in Episode 21 leaves Professor Chronotis vulnerable, which Skagra exploits to isolate Chronotis in Episode 22."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
The Doctor and Romana's visit and subsequent departure (as witnessed by Wilkin) creates the opportunity for Skagra to target Chronotis. Wilkin's confirmation of the Doctor's departure in Episode 22 directly stems from this earlier event.
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.