Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Tegana volunteers for the oasis mission
S1E15
·
The Singing Sands
To
The Doctor’s collapse forces a TARDIS intervention
S1E15
·
The Singing Sands
Why These Connect
The narrative assertion
"The stress of dwindling water and Marco and the Doctors discussion, directly causes The Doctor to finally collapse, leading to the plan to use the TARDIS for his comfort, but splitting up the group."
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.