Ah ok got you.
Here you go.
1. create a value (anywhere you like) & name it: previous_scene
2. now add the script below to the script section of the editor.
Values["previous_scene"].String = game.CurrentScene:getName()
game.CurrentScene = Scenes[Values["previous_scene"]]
3. to save scene add an execute a script action part just before changing to new scene containing...
4. to restore scene add an execute a script action part containing...
This tutorial / code is written off the top of my head, so I can't guarantee it will work.