Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"Polo's seizure of the TARDIS under Tegana's influence (Episode 17) directly causes the TARDIS's theft in Episode 19. The Doctor's warnings about the key's danger foreshadow its theft by Ping-Cho, who takes it to bribe a caravan driver."
inferred by llm_cross_episode_arc
Why This Matters Across Episodes
The longer arc this connection carries
This is the series' core escalation: Tegana's manipulation leads first to the TARDIS's seizure and later to its theft. The Doctor's insistence that the key cannot be used without knowledge highlights the TARDIS's vulnerability, culminating in its actual theft.
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.