Uncle Arthur has fallen in love with Aretha (Barbara Rhoades), a snobbish witch with no sense of humor whatsoever. So as not to scare off Artetha, Arthur "deposits" all of his practical jokes with Darrin and Samantha. Unfortunately, this overabundance of gags is visited upon Darrin's new client, Mr. Rockfield (J. Edward McKinley), who, like Aretha, is in no mood for laughs. First shown on February 11, 1971, "The House That Uncle Arthur Built" was written by Bernie Kahn. ~ Hal Erickson, Rovi