Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Cybermen confirm Voga's doom in time
S12E20
·
Revenge of the Cybermen Part 4
To
Cyber Leader abandons negotiation for annihilation
S12E20
·
Revenge of the Cybermen Part 4
Why These Connect
The narrative assertion
"The Cybermen Leader's initial plan to destroy Voga by bombs (confirmed in the Control Room) is thwarted by Lester's sacrifice, leading to the Cybermen pivoting to their alternative plan of crashing the Nerva Beacon into Voga."
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.