Elizabeth Montgomery is credited under her real name in the role of Samantha Stephens. She is credited as Pandora Spocks in her role of Samantha's look-a-like cousin, Serena.
Richard X. Slattery (aka, Mr Ferguson, the angry neighbor) was well known to Los Angeles Dodger Fans and "Union '76" Gas Station customers and commercial watchers for being the face of all '76 Gas Station Attendants. It would be the concept of "Self-Serve" Gas Stations that made the Irish-American "Murphy" lose his job - and Mr Slattery his beloved role.
East Coast Viewers (especially in Indiana) finally could see the Standard Gas Station Sign down the street. Ferguson is rolling up his sleeves to pin back Darrin's ears for pulling up his bush when the Iconic Red, White and Blue "American" (Standard) Gas Sign appears all blurry above some tall bushes.