The title of this episode is also shown on screen at the beginning, with lights twinkling as it was originally made to do before part of the sign burned down in 1949. It was rebuilt, just as HOLLYWOOD, with the last 4 letters omitted. One reason given was that at a letter count of 13, "Hollywoodland" felt unlucky. Up until 1949, when it almost all burned down, it was a popular suicide spot; people would jump off the second letter "D", being letter #13 of the sign, and over the steeper part of the mountain over a cliff.
Hedy Lamarr developed frequency hopping or spread spectrum, and it was more likely to be used with cell phones (or smart phones) as oppose to Wi-Fi. It is especially useful when the mobile user is moving between cell transmission towers -the cell signal has to be handed off, or hopped, to a different frequency.
The dress that Lucy is wearing at the Hearst party is a replica of the dress worn by Katharine Hepburn in Indiscrétions (1940).
Barney Balaban, depicted in this episode, was the real President of Paramount Pictures for nearly 30 years. The actor Bob Balaban is his nephew.
Hollywoodland was the original name of the housing development in the area before it was truncated to Hollywood.