Writer:	Rudolph Borchert
Director:	Allen Baron
Star:	Simon Oakland (Tony Vincenzo),  Darren McGavin (Carl Kolchak)
Recurring Role:	Jack Grinnage (Ron Updyke),  Paul Baxley (Cop in Alley)
Guest Star:	Mews Small (Masseuse),  Clint Young (Driver),  Cathey Paine (Ellen),  Donald Mantooth (Second Policeman),  Dulcie Jordan (Driver's Wife),  Mickey Gilbert (The Ripper),  Beatrice Colen (Jane Plumm),  Ken Lynch (Captain R.M. Warren),  Ruth McDevitt (Elderly Peeping Tom),  Roberta Collins (Police Detective Susan Catazzo),  Denise Dillaway (Debbie Fielder),  Ike Jones (Mail Boy)

Carl Kolchak's outfit that he wore during the run of the series was a straw hat and a light blue seer-sucker suit with a three-button jacket. (edit) Kolchak's wheels for the series was a 1966 Ford Mustang Convertible, used during the run of the series. (edit)

Jane: You think you get screwball letters in the Dear Emilys? I am personally interviewing guys who claim to be the Ripper. I'm up to number nineteen.
Kolchak: You are being very foolish, Jane. You are being dumb, Plumm. (edit) Kolchak(closing narration): And here's the postscript. When they drained that pond, they found nothing - nothing but some old clothes. For some reason, the police suddenly decided they wanted those... and my head. I don't know how Vincenzo will handle the charges of arson and malicious mischief lodged against me by Captain Warren, but that fire was a big one - a six alarmer. A blast furnace couldn't have done a better job. Everything gone - the house, my story, the evidence. Like they say, ashes to ashes. One thing survived the inferno, however. There's enough of it left to read the name of the maker. Peele's Footwear, London, Southwest 1. They're still there, of course, but they don't make this style shoe anymore. It was discontinued over seventy years ago. Seventy...years...ago. (edit) Carl: (opening narration) If, by chance, you happened to be in the Windy City between May 28th and June 2nd of this year, you would have had very good reason to be terrified. During this period, Chicago was being stalked by a horror so frightening, so fascinating, that it ranks with the great mysteries of all times. It’s been the fictional subject of novels, plays, films, even an opera. Now, here, are the true facts… (edit) Masseuse: Are you a tennis player?
Carl: Uh, what? No. No. Why?
Masseuse: Because your shoes are so funny.
Carl: I run a lot. (edit) Carl: For reasons I have never been able to understand, Vincenzo has always confused my reporter's clever ingenuity with what he calls high-handed lunacy. (edit)

Although it's claimed the Ripper here performed surgical mutilations on his victims just like the original, the only weapon he ever uses is s a sword cane, with which it would be impossible to perform such mutilations. (edit) Historically, the electric chair was first used in New York in 1893, not 1908 as stated here. (edit) There are several historically inaccurate facts given about the real-life Jack the Ripper in this episode. He never struck twice on subsequent nights at the same place, and he never wrote any rhyme such as that credited to him here. (edit) Ruth McDevitt plays an elderly old lady in this episode, writing a letter to Miss Emily. McDevitt would later play Miss Emily herself in later episodes. Carl doesn't comment on the uncanny resemblence, however. (edit)

Captain Warren
A deliberate in-joke on the writer's part: Sir Charles Warren was one of the primary investigating officers in the original Ripper murders. (edit)