I didn't read what everyone else posted because work has been extremely busy. Sorry to those who posted before me, I don't mean to be disrespectful of your opinions. I promise to read all the prior posts when I get an opportunity. That being said:

Holy shit! What an episode! I immediately sank into fear when I heard that final silenced shot and the proceeding footfalls as the shooter made a hasty get-away. But the lack of any other sound effects has me wondering: What the hell got shot? Was it Hope or the Radio? I didn't hear Hope react to being shot, nor did I hear electrical short-circuiting. I don't believe there would be any reason to shoot a blind girl who couldn't see the shooter. But if Victor's use of cologne has any purpose in the story, this may be it; Hope might say she smelled a very distinct cologne. And bam! Victor is the patsy to Steven's genious. (just random theories)

Although Pippin said, "It's you!" this doesn't mean that it wasn't someone he had already seen in the Tower. It could have been that Pippen knew there was a mole already in the tower but simply didn't know who. Then when, let's say, Kelly walked in with a silenced pistol, he realized she was the original mole planted by the Mallers, leading him to be suprised.

Honestly though, I'm done theorizing for this episode. Freakin KC has me biting my nails and trying to be a Sherlock about it all. Who had access to Burt's guns when Datu brought them back? If someone lifted the silenced pistol from the back, why did they need to break in to the armory and set off the alarm? Was that just a distraction to draw Angel out of the room? Has the mole truly changed sides and joined the tower giving he/she motive to kill Pippin as so to avoid being discovered? Who the fuck shot JR?!