Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Tegan faces her Mara-tinged nightmare
S20E5
·
Snakedance Part 1
To
Doctor guides Tegan through hypnosis
S20E5
·
Snakedance Part 1
Why These Connect
The narrative assertion
"The Doctor's initial questioning of Tegan about her dreams (after her nightmare in the TARDIS) directly leads to his hypnosis plan later in Act 2. This inquiry establishes the need for intervention as Tegan's fear and connection to the Mara deepen."
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.