Causal
medium strength
Narrative Connection
How these two moments in the story relate
From
Doctor reveals the Key to Astra
S16E24
·
The Armageddon Factor Part 4
To
Doctor probes Astra's ties to the Key
S16E24
·
The Armageddon Factor Part 4
Why These Connect
The narrative assertion
"Astra reassures the Doctor about Merak's well-being despite earlier signs of her betrayal. This conversation sets up a test when the Doctor triggers the Key tracer to probe her mind, revealing her duplicity when she simultaneously reaches for the tracer and denies its meaning."
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.