Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Doctor trapped by cosmic spider's illusion
S11E25
·
Planet of the Spiders Part 5
To
Heroes flee possessed horde in cellar
S11E25
·
Planet of the Spiders Part 5
Why These Connect
The narrative assertion
"The Great One's illusion and mind control demonstration on the Doctor (beat_2fe50f6289e57609) leads directly to the spiders' successful invasion on Earth (beat_0a62c8ad7c94a2fb), as the crystal's power is central to the invasion plan."
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.