Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"K9's integration into the Argo's systems in Episode 17 leads directly to his weakened state in Episode 18, where he must be abandoned due to his inability to recharge."
inferred by llm_cross_episode_character
Why This Matters Across Episodes
The longer arc this connection carries
The Doctor's repurposing of K9's systems in Episode 17 weakens K9 by Episode 18, forcing the Doctor to abandon him. This creates a causal link between K9's technical role and his abandonment.
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.