Narrative Connection
How these two moments in the story relate
Why These Connect
The narrative assertion
"The Doctor's decision to take a leisurely break (fishing) directly leads to Romana being left alone to pursue the Key to Time segment. This separation sets up Romana's capture by Grendel, which in turn motivates the Doctor's later involvement with Prince Reynart's android repair—both protagonists are drawn into Tara's political conflict due to the mission delay caused by the Doctor's desire for a break."
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.