Arlene Francis had opened on Broadway this past week (Tuesday, October 21, 1958) in "Once More, With Feeling" and guest panelist, Tom Poston, was on Broadway, as well, in a short-lived comedy called, "Drink to Me Only."
Mystery guest panelist, Imogene Coca, is correctly identified by Arlene Francis in this episode. Miss Coca had just opened in a Broadway comedy, "The Girls In 509" on October 15, 1958 and John Daly mentions its correct title (Arlene Francis calls it "509" before she ID's Imogene).