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Appearances
Signal
Guest cast, played by Kim Min Gyu
- Episode 1x02: We Still Have a Chance (Jan 23, 2016)
- Episode 1x05: Changing the Past Alters the Present (Feb 5, 2016)
- Episode 1x06: Catch Him by All Means (Feb 6, 2016)
- Episode 1x07: We Must Dig Deeper (Feb 12, 2016)
- Episode 1x11: The One Last Case (Feb 26, 2016)
- Episode 1x16: If You Don't Give Up (Mar 12, 2016)