E/R (1984) to General Hospital: Night Shift

E/R's Nurse Julie Williams was related to The Jeffersons. And George Jefferson appeared on E/R

George Jefferson gets help from Barney Collier from Mission Impossible

Mission: Impossible was continued 22 years later

Diagnosis Murder's Doctor Jesse Travis's father is a spy that someone is trying to kill. One of the possible suspects is the original Mission: Impossible's Cinnamon Carter.

Diagnosis Murder's Dr Mark Sloan was defended by Matlock when Sloan was accused of murder

All My Children and Loving feature the fictional Trans Global Airlines

All My Children and General Hospital crossed over a number of times.

spin off of General Hospital