Waking up and seeing Mrs. Cobel is probably the most terrifying thing ever. It’s so crazy seeing the innies trying to make sense and understand each scenario they’re in. 
The reveal that Helly is Helena Eagan was subtly hinted at, but the reveal is still crazy. It also makes so much sense and explains why her outie was so adamant about keeping her there. The scene of her reciting the apology from the break room fit so well too. 
Irving’s storyline was also very interesting. It seems like his reason for being a severed employee was to take them down this whole time.
Seeing all the innies in the outie world was amazing but I 100% need to see Dylan experience this next season. He’s the only character we still know very little about. 
They left us with absolute chaos and anxiety and I hope they raise it even more in the next season.