Uh...all of them?
Futurama
For all things Futurama
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Not sure I'll be able to do so, but if someone can watch it until then of course this is the ultimate solution
You don't have to watch the new season when it comes out, you are allowed to wait until you're caught up.
Farnsworth parabox is one of my favs.
Roswell that ends wall is a pretty big story point on fry’s story and is hilarious.
Never a bad idea to revisit all of the series finales so you know how to stack ‘em up when they inevitably can the show once again.
Luck of the Fryrish The Devil’s Hands Are Idle Playthings Bender’s Big Score Lethal Inspection The Sting Game of Tones Meanwhile
The Luck of the Fryish is a good one.
The Late Philip J. Fry is also worth watching.
All of them except In A Gadda De Leela, Attack of the Killer App, and Reincarnation
This guy did a breakdown of the Futurama teaser from Hulu.
You might find ideas/suggestions on a few episodes to review. Only one I would suggest is Meanwhile which was the last episode the last season.