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Appearances
Signal
Guest cast, played by Jung Han Bi
- Episode 1x05: Changing the Past Alters the Present (Feb 5, 2016)
- Episode 1x09: Hongwon Dong Case (Feb 19, 2016)
- Episode 1x10: Someone Has to Stop the Bad Guys (Feb 20, 2016)
- Episode 1x11: The One Last Case (Feb 26, 2016)
- Episode 1x13: The Real Assailant (Mar 4, 2016)