Shelby?
In this past episode, it seemed like Shelby didn't suspect/know Miranda was acting against the FBI's interest (or seemed to be). But didn't she conclude that Miranda was the problem in the episode a few weeks back, when she didn't give Miranda the last copy of that document she had worked on?
Also, What was that scene near the end where Shelby, Ryan, and Raina are in the room, Alex leaves after their meeting but asks if Ryan is coming, and they close the door? Were we supposed to know what that meant? I know they were making Shelby's cover; but Ryan wouldn't need to be there for that.