The made-for-TV movie you're thinking of, Patti, was the pilot (and a very young and nervous 21-year-old Stephen Spielberg directed Joan Crawford in that memorable second story). The show then became part of an NBC "experiment" called, I do believe but am no longer positively sure, "Three In One". Over one season, in the same time-slot, three different programs aired; I think one was one of those typical early seventies lawyer shows, there was Night Gallery, and I don't remember the third. Of the three, only Night Gallery survived because of very good ratings and continued for several more seasons.
One of the most frightening stories, to me, was in the first episode (not the pilot, the first episode of the new series) in which Carl Betz, formerly of The Donna Reed Show and Judd for the Defense, plays a doctor who, through hypnotism, can cause a subject to display all the symptoms of any disease. With a certain signal, he can snap him out of it, the disease completely gone. Unfortunately for him, the subject he was using, a handsome young man, was having an affair with Betz's character's wife. The doctor tries to take the experiment to the extreme and hypnotize the subject into dying. That works, but when the doctor gives the signal, the young man does not revive and is buried. Much, much, much later the doctor learns he was giving the wrong signal. The very-devastated wife learns of this and runs to the mausoleum, throwing open the doors and pounding on the casket with the right reviving signal. To this day, the final, climactic scene showing what happened in that burial chamber after she was "successful" in "snapping him out of it" still give me shivers.
Gerard