Herb Vigran guest stars as building inspector Armstrong, who shows up at the bank building to check out "Jed Clampett Enterprises." Worried that Armstrong will not be amenable to Jed and Granny's combination fix-it shop, medical clinic, and discount hair salon, Drysdale and Jane try to convince the inspector that the Clampett's fifth-floor offices do not exist. The best scenes occur at the beginning of the episode, when Armstrong mistakenly believes that former tenant Jethro has committed suicide! Also worth a few chuckles is a running gag involving a customer named "Julie Andrews." "The Phantom Fifth Floor" was originally telecast on February 12, 1969.