Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Ian discovers Yetaxa’s hidden escape tunnel
S1E30
·
The Day of Darkness
To
Ian reveals hidden tunnel and learns of Susan’s imprisonment
S1E30
·
The Day of Darkness
Why These Connect
The narrative assertion
"Ian discovers a tunnel (beat_5fe46d90589e413a), leading to his reappearance in the temple, surprising Barbara and the Doctor (beat_388e2ffc6354daba)."
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.