Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
TARDIS under attack by antimatter entity
S20E1
·
Arc of Infinity Part 1
To
Doctor learns antimatter creature’s nature
S20E1
·
Arc of Infinity Part 1
Why These Connect
The narrative assertion
"Nyssa's identification of the red dot as an extradimensional entity triggers the Doctor's explanation of the attempted temporal bonding and antimatter nature."
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.