Wow! Have just finished watching with a slight delay.
Janine had better be OK. As someone else said, I think she may have been seen being led away with a rescuer.
Lydia said "that's testament to..." when making her deal with Commander Lawrence (can't remember what the rest of her sentence was, but perhaps a clue she is going the way of The Testaments.
So they've all got dirt on each other - Lydia knows all about Lawrence, and she dished the dirt on the other Commanders, which enabled Lawrence to get his seat back at the table.
It's interesting that Lydia told the new intake of Handmaid's that she'll listen to them if men try to take advantage (or something like that). Maybe as a way of getting even more info on the Commanders to feed to Lawrence.