Dragnet 67 to Jake and the Fatman
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
Diagnosis: Murder
Diagnosis Murder's Dr Mark Sloan was defended by Matlock when Sloan was accused of murder
Jake and the Fatman
Diagnosis Murder was a spinoff of Jake and the Fatman.