In the fourth episode of a seven-part story arc, Samantha and Darrin are vacationing in Italy when Sam discovers that Esmerelda was the one who caused the tower of Pisa to lean way back in the 15th century. In endeavoring to make up for her past blunders, Esmerelda succeeds only in ruining the Pisa tourist trade. Everything is resolved by yet another "blast into the past," courtesy of Sam. Originally seen on October 6, 1971, "Samantha's Not So Leaning Tower of Pisa" was written by Ed Jurist. ~ Hal Erickson, Rovi