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Appearances
Signal
Guest cast, played by Son Hyun Joo
- Episode 1x07: We Must Dig Deeper (Feb 12, 2016)
- Episode 1x11: The One Last Case (Feb 26, 2016)
- Episode 1x14: Not Now, But Maybe in the Past (Mar 5, 2016)
- Episode 1x16: If You Don't Give Up (Mar 12, 2016)