Alright, so you have two options.
If you really want the fade in, on the subsequent episode, you should put something along the lines of:
INT. BLACK - NIGHT (so it starts off as black.)
@transition fade in 4
insert your background code here
or
Just dont use @transition fade in at all
The problem is the code reads transitions and automatically looks for the last scene so it could transition into the next. So it saw nothing before your @transition and thought to transition from the last ep.
Or at least it should. Try it and tell me if it works or not.