In the latest episode of SBS Wednesday-Thursday drama 'Ghost', Kwon Hyuk Joo (played by Kwak Do Won) has arrested Park Ki Young (played by So Ji Sub) for the murder of Shin Hyo Jung, raising the possibility that his real identity may be compromised.

The episode, which aired on the 13th, shows Kwon Hyuk Joo discovering the passcode to Hades' laptop. While looking around the office in which Ki Young worked for clues, Kwon Hyuk Joo runs into Choi Seung Yeon (played by Song Ha Yoon).

Kwon Hyuk Joo asks Seung Yeon if she knows the passcode to the laptop that Ki Young used to use, which Seung Yeon tells him.

Subsequently Kwon Hyuk Joo enters the passcode that Seung Yeon gave him into the computer which Hades used, realizing that Kim Woo Hyun is the criminal. He then arrests Ki Young for the murder, not knowing his true identity - yet.

Meanwhile, the episode featured the release of a virus called Stuxnet which cut off power to all public buildings, causing widespread panic and confusion in the city.