E5 is a brake-pump from the previous two banger episodes. This one is basically about how everyone responds to the ORTBO. It's quite funny in parts but not too much happens.
Main events are Irv and Burt meeting in the outside, Dylan finding the directions to the exports hallway that Irving left, Milchick shifting into (child born out of wedlock) gear, and sketchy Dr. moving in with Mark while she performs the multi-treatment reintegration (bit of a bait and switch there as I'm sure most viewers assumed it was a one-time procedure).
Mark is most affected by the events of the ORTBO, and understandably so I think. There's a couple great framings of him in two different scenes of speaking to Helly. In the hallway scene, half of his head is cut off by a wall. In the bathroom scene, he is framed between two Helly's, one in person and one in the mirror. Love the camerawork.
The surprise interesting character of this season so far is Milchick, who they have gone out of their way to humanize. His performance review was simultaneously hilarious and sad.
Oh also, this ep confirms my "So can we assume" post above.