At one point, Sgt. Enright is giving a background report on the second murder vicim and mentions that she received several letters from "some guy named George Kimball," which happens to be the name of the character Rock Hudson played in his third film with Doris Day and Tony Randall, Send Me No Flowers.
This is Martha Raye's first appearance as Mildred's nutty sister Agatha. However, Agatha would not become a regular character until the show's final season.
First non-soap opera, non-daytime (primetime) filmed role for Howard McGillin, who portrays the role of bellhop here, later to become the longest running "Phantom of the Opera" in Broadway history.