Actor Paul Frees, who provided the voice of the unseen John Beresford Tipton throughout the series' 6-year run, has an on-screen role as blowhard Texan Martin B. Martin.
Actress Tido Fedderson, wife of producer Don Fedderson, who appears in each episode of this series in a non-credited, non-speaking cameo, appears this time in a portrait in the apartment of character Nancy Wellington.