The obvious connection is to the fourth season alternate universe finale -- which was titled "The End in the Beginning" -- and while there are some tie-ins between the two hours, they're more like subtle nods.
That being said, Korbi TV has compiled a list of five episodes you should be familiar with in preparation for next week's season ender.
While we can't tell you why they relate to the upcoming finale, we can tell you what the original FOX press releases said about the individual episodes. We can also maybe say whether the press release mentions the reason(s) you should be rewatching them.
So, without further ado...
Tipster: anonybird
on DVD today at 
as well at