How to delete the episode when using?

[goodstudent9]

When I initialize a sim, and then I create the episode.
But I want to delete some episode when I don't need the episode anymore.
I also need to create episode too.
If I can'e delete episode, the memory will crash!
What can I do?
Do you have more tutorial and document that tell me more about the api?
Thank you for your help.