This was the first episode filmed in front of a live audience following the assassination of John F Kennedy. The previously filmed episode "Happy Birthday and Too Many More" utilized a laugh track since the producers decided to respect the somber mood of the country and cancel the live audience.
When the lawyer is asked by Sally about his knowledge of comedy, he says one his idols is W. C. Fields. Sally asks, "Not Clarence Darrow [a lawyer]?", he replies, "No Frankie Darro." Darro was a comic actor of the 1940's.
Based on where the Petries live, in New Rochelle, the amusement park Sally and Arthur refer to when they want to go to the shooting gallery is likely Playland Park, located about 15 minutes away in Rye, NY.