Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
White Guardian rewards Turlough with cosmic power
S20E20
·
Enlightenment Part 4
To
Turlough rejects darkness to destroy the Black Guardian
S20E20
·
Enlightenment Part 4
Why These Connect
The narrative assertion
"The White Guardian's offer of the diamond to Turlough prompts the Black Guardian's immediate temptation: offering Turlough 'the TARDIS, and anything else you desire' in exchange for the Doctor's life. This poses the ultimate moral test and sets up Turlough's defiant act."
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.