Guest actors Gene Lyons (Art McNeil), Stewart Moss (Judge Tyler), and Peter Duryea (Peter Mitchell) subsequently appeared in first season episodes of Star Trek (1966): A Taste of Armageddon (1967): The Naked Time (1966) and The Cage (1966), respectively.
Guest star Robert Drivas (Lee Gould) subsequently played the son of two actors in this program. Drivas played David Janssen's son in Where It's At (1969), and later played Harold Gould's son in 'V' for Vashon: The Son (1972).
This is the first of three appearances Harold Gould makes in the series, each time playing a different character. The other two appearances occur in Wings of an Angel (1965) and Concrete Evidence (1967).