Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor frees them under alarm
S10E9
·
Frontier in Space Part 1
To
Doctor creates diversion to flee Ogrons
S10E9
·
Frontier in Space Part 1
Why These Connect
The narrative assertion
"The Doctor successfully unbolting their cell door allows him to devise and execute a plan to create a diversion by pushing Stewart into the path of the Ogrons, enabling Jo to escape."
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.