Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor tames Zarbi for escape
S2E20
·
Invasion
To
Doctor exploits Zarbi control flaw
S2E20
·
Invasion
Why These Connect
The narrative assertion
"The Doctor and Vicki discovering their control collars are defunct (beat_e085efb5f834c0c8) directly enables the Doctor to conceive of using his ring to control a Zarbi (beat_2670830a69ec6841), setting up their escape plan. The defect is a prerequisite."
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.