Sheila Sommers

 is Darrin Stephens' ex-fiancée, who is beautiful, but a rich and spoiled snob.

After Darrin marries Samantha, Sheila humiliates her by commenting on her appearance, suggesting that she and her friends help Samantha find a good hairdresser and dressmaker. She insults Samantha by insinuating that she had "nose work" done.

Samantha gets pushed over the edge watching Sheila hanging all over Darrin, and uses her witchcraft to cause Sheila to become undone so everyone can see what she really is. After returning home, Darrin tells her she was not entirely wrong, and Sheila had it coming.

A few years later, Sheila again behaves like a snob and Samantha uses her witchcraft and has her become undone all over again. The next day, Samantha apologizes to Darrin, and he tells her Sheila deserved it.

Episodes

 * I, Darrin, Take This Witch, Samantha
 * Snob in the Grass
 * If They Never Met