At Samantha's suggestion, Endora decides to briefly experience life as a mortal. Endora transforms herself into a clone of Samantha -- then causes no end of trouble when she begins dating author Bob Frazer (Ron Randell), one of Darrin's oldest friends. Familiar comedy foil Monty Margetts appears as a confused saleswoman. Originally telecast on March 11, 1965, "Which Witch is Which" was written by Ruth Brooks Flippen, the wife of character actor Jay C. Flippen. ~ Hal Erickson, Rovi