Dragnet 67 to General Hospital
6 connections
Dragnet 67
Dragnet
Dragnet spun off Dragnet 67
Adam-12
The main characters from Adam-12 appear as witnesses in an episode of Dragnet
Emergency!
Emergency! had a crossover with Adam-12 to find a boy who ran away from the hospital.
Matlock
Both feature the fictional Trans Global Airlines
All My Children
All My Children and Loving feature the fictional Trans Global Airlines
General Hospital
All My Children and General Hospital crossed over a number of times.