Jung Woo confirms that Hye In is the Athena spy but still lets her go. That didn't surprise me at all. People do stupid things for love so his decision was understandable. What baffled me was the reaction of the NTS director. When JW explained his reasons for letting her go, including saying that he was in love with her, Dr. Kwon simply hoped he made the right decision. I mean, seriously, NTS is a mess and it's not just because of Athena.
Hye In attempts suicide but is saved by JW. While recovering at the hospital, she's taken by Son Hyuk. She wants out of Athena but SH doesn't want to let her go. It wouldn't really be that easy anyway.
Son Hyuk meets with the NK envoys in an effort to stir things up between the North and the South.
Jae Hee's dad is discovered and is killed by Athena while being transported to NTS. Jung Woo spots Hye In at the scene. She didn't take the shot but you already know she's going to get blamed for it.