Kim Hye Soo

Signal: Nathan Park tries to save Detective Mia Cha's life
Signal: The past has changed | Teaser
Signal: Robert helps Nathan resolve the first cold case
Signal: The transmission is back | Episode 7
Signal: Messing up the time line | Episode 7
Signal: Robert Lee, the savior from the past | Episode 6
Signal: Nathan Park interrogates Channing Lee | Episode 6
Signal: The real killer of the Gyeonggi Nambu Serial Murders | Teaser
Signal: The search for the real killer
Signal: The big announcement | Episode 5