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Appearances
Signal
Guest cast, played by Shin Yi Joon
- Episode 1x11: The One Last Case (Feb 26, 2016)
- Episode 1x12: The Case Was Manipulated (Feb 27, 2016)
- Episode 1x13: The Real Assailant (Mar 4, 2016)
- Episode 1x14: Not Now, But Maybe in the Past (Mar 5, 2016)