When Aram found that the fake Keen had just murdered the chemical weapons lady and fake Liz began to approach Aram in that interrogation room it was clear to me that he would fumble the ball again and allow her to outsmart and overpower him.

Once he had bulletproof plexiglass between himself and the fake Keen Aram tried to salvage his manhood by discharging his weapon harmlessly into the glass.

How much training must he have taken on avoiding the sort of move fake Keen just pulled on him? He knew once the murderer disobeyed repeated commands to stop and moved within a certain distance he was supposed to shoot her.

His other option would have been to back out the door and close it, trapping her inside.

How can they allow someone who consistently proves himself to be unwilling to follow procedures to function as part of this team?

Why did Keen know the codes? They would have been changed when she became a fugitive from justice again. Did Harold tell Aram to change the codes? I can just imagine Aram thinking something like

But if I change the codes, we will know the codes and she won't. That doesn't seem fair.

That would give us an unfair advantage over her. Shouldn't she have an equal chance to win?

What if she merely wants to sneak inside and say hello?

Fake Keen speaking for the real Keen looked at the stupified Aram through the glass

I'm sorry for making you look like a panty-waisted idiot again, Aram. But it's certainly not the first time. Nobody really expected you to be able to subdue an unarmed woman all by yourself.

The writers are really asking us to suspend disbelief quite a lot, are they not? The doppelganger snuck up on the SWAT guy, okay, maybe, but then she was able to get the drop on Donald Ressler, who is well trained and knows to use the curved mirrors to see around corners.

Or did he mean to let her get away? I don't think so, not this time. That wasn't the real Keen, and Donald knows she killed on Keen's command. Things have changed. So Donald being caught unawares wasn't believable at all.

Earlier we were told that fake Keen was told the codes to get to chemical Mary. Now she says she doesn't know the new codes, so which is it?

And why didn't Cooper have all exits covered? This is just too absurd.