A really good concept for this episode with Kryptonite making its deadly return, but affecting an old friend of Clark Kent's in Gary Allan (Robert Lowery), returned from world travel. It's interesting how often United Airlines is shown, both as Gary's plane and in the wall posters at the airport; were they a sponsor? The two heavies living high on the hog in a spacious house are also well-cast, like Lowery, but why they picked Steven Geray to play Professor Van Wyck as a sputtering, stammering milquetoast who does everything expect balance a circus ball on his nose for attention is bothersome. There was a lot of dramatic possibility in this story, but Van Wyck is just a cartoon, not a character. "The Adventures of Superman" as a series in whole, especially in its later years, was not kind to professors (i.e., Pepperwinkle; Van Wyck; the Yoda-talking Rolfe Sedan character in "The Big Freeze", etc.), so I wonder if Florida Governor Ron DeSantis grew up watching this series, given his horrid attitude toward college and university faculty and higher education in general.