The series was sponsored by Post Cereal and two of the guest supporting actresses (Argentina Brunetti and Bella Bruck), join the stars (Annie Farge and Marshall Thompson), in a Post Cereal commercial while in character at the end of the show.
This seems to be the pilot film for the series, there's subtle variances in the lighting and photographic direction from other episodes; and this has a different version of the animated opening credits, including the caricature of Oppenhiem, here seen as bald.