Mildred knows a way out so she shows Ethel. She didn't actually have to go outside with her. I'm sure Ethel could have figured a way over the wall. Anyhoo Nightstar was having a snack. They go back to go in but there were kitchen witches. Uh when there's magic fog that causes your headmistress to lock down the school do you really think you're going to be sent back outside for punishment? They'd be glad you're back in one piece but of course the girls end up going in another way and go back in time when Maude and Ethel's grandmothers were going to school including the Cackle twins. Hello Mama Cackle. Aren't you tricky pretending Ada was the eldest for all those years. I wonder what Mildred was talking about. Was she just promising not to mention that Ada isn't the eldest and that it should be Agatha running the school.
Maude is besties with the twins and they seem to be up to mischief. The twins want to steal a bit of Mama Cackle's magic. I think her name is Alma. This is like Charmed with all the P names except with the letter A. The twins offer to help the girls but Agatha just stole the book and took off. At least Mildred had the good idea of writing a note in the desk so Maude in the future could let the others know about what was going on. Soon they got confirmation that Ethel and Mildred were trapped in the past when they showed up in the school picture. Ada goes back to the past and Ethel returns but hello things are different because was kicked out when she was found in Alma's office. That's a bit extreme Alma.
For a second there it looked like Ada was going to go evil because she decided to do the spell to get all of Alma's powers but Agatha tried to do the spell instead after Mildred gave a heartfelt speech about how awesome future Ada is. The spell goes awry and things are changed back and Mona gets to stay. When Mona was leaving Maude got nasty. She was absolutely horrible. So if Mona left Mildred wouldn't even have Enid as a friend or was she even there? Anyhoo Ada gets back and there's no sign of Mildred. She found Nightstar and met Ethel's grandmother. She comes back and all is well. Just make sure to go back in the right door if something like this happens again.