S4·E14 My, What Big Ears You Have

Darrin is planning to surprise Samantha with a rocking chair, but Endora thinks that he is fooling around with another woman. This woman, in fact, is the saleslady that Darrin makes the final payment to. To see what he is up to, Endora puts a spell on him causing his ears to grow when he tells a lie. The more Darrin lies about the surprise, the more his ears start growing. He finally tells her the truth: he bought her a rocking chair and wanted to surprise her. He hid it in the Kravitzes' garage for safe keeping.