S5·E15 Cousin Serena Strikes Again (1)
Aired January 9, 1969
Synopsis
A sexy client named Clio Vanita tries to get with Darrin, but not if Serena can help it. Taking up for her cousin, Serena decides to turn Clio into a monkey! Darrin tries to get Serena to change her back, but she doesn't and Clio the monkey hangs around......