Bewitched S01 E31 That Was My Wife

"Witches are people too!"

Samantha and Darrin spend the night at a hotel and Samantha briefly changes her hair to brunette. Larry spots them and thinks Darrin is having an affair. Larry proceeds to tell Louise. Louise meets with Darrin at a hotel hoping to convince him to drop the other woman. Larry spots them and thinks Darrin's other woman is Louise.