Adam-12 to The Bold and the Beautiful
4 connections
Adam-12
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
The Young and the Restless
Both have characters that have flown on the fictional Trans Global Airlines
The Bold and the Beautiful
The Young and the Restless and The Bold and the Beautiful crossed over multiple times.