Miss Cowels is listed as "Edith" here.
Edith/Emily is introduced here with the last name of Cowels, and the job of "riddle columnist". In The Ripper her last name was "Fenwick" and she was an advice columnist.
Kolchak: (opening monologue) Admittedly, the story you are about to read is bizarre, incredible. Those of you who wish to avoid being unsettled, who wish to avoid thinking, will label it insane. And though you, the reader, would find these facts almost impossible to substantiate, that does not change their nature. Facts they are, I know. I saw them happen.
Vincenzo: How come you never get sick, Kolchak?
Kolchak: I must live right, sir.
Mel: Do you know why they call it a bikini?
Carl: (sotto voce) Because that's where they set off the atomic bomb.
Mel: Because that's where they set off the atom bomb!
Carl: I'm a reporter.
Mel: A reporter...oh, like the Fifth Column.
Paula Griffin: I don't know what's gotten into everybody...
Kolchak: Claws and fangs. And it's not going to stop, either.
This is Ruth McDevitt's first appearance as Edith/Emily Cowels, even though her character is purportedly on vacation in "The Ripper" and returns from that vacation in the next episode, "The Devil's Platform."