|Relatives||Samantha Stephens (niece)|
Tabitha Stephens (great-niece)
Adam Stephens (great-nephew)
Darrin Stephens (nephew-in-law)
|First Episode||The Witches Are Out|
|Last Episode||There's No Witch Like an Old Witch|
Bertha is Samantha's aunt. She comes to visit to discuss Halloween. She is friends with Clara and Mary, who also attend the meeting. She is talented at imitating voices. Bertha is dismayed that Samantha is trying to give up witchcraft. She is also frustrated that Clara's spells go awry.
Bertha is sorry that Darrin lost his job and wants to help. She, Samantha, Mary and Clara visit Mr. Brinkman in his bedroom to protest (complete with signs) his witch prejudices. They change him into an ugly witch and he changes his mind.