Causal
strong strength
Narrative Connection
How these two moments in the story relate
From
Romana and Hardin force tachyon rejuvenation
S18E2
·
The Leisure Hive Part 2
To
Romana sees the melting hourglass
S18E2
·
The Leisure Hive Part 2
Why These Connect
The narrative assertion
"The catastrophic failure in the tachyon rejuvenation apparatus—marked by the green pulse and loud bang—directly leads to Romana's urgent warning to the Doctor, forcing a perilous turn in the climax."
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.