I remember the “Great Caesar’s Ghost” episode from when I was a kid, and I’ve seen it as an adult, too, although that was in the nineties, I think. Of course, Perry is haunted by the apparition he invokes, and at one point tries to escape from an airplane in flight, until Superman intervenes.
As I understand it, the show was an explanation for dropping the phrase from Perry White’s vocabulary, which they were doing because it was an oath, even if bowdlerized.
“And don’t call me Chief!”