Darrin blows his top again, when he thinks that Samantha has used witchcraft to create a winning ad slogan. As it turns out, Sam does help Darrin, albeit in the time-honored "trial and error" fashion preferred by those irksome mortals. J. Edward McKinley, one of the series' stable of recurring character actors, is once more cast as Darrin's client, this time a man named Benson. First broadcast on March 11, 1972, "A Good Turn Never Goes Unpunished" was written by Bernie Kahn. ~ Hal Erickson, Rovi